Added datasource files for cloudfunctions2_function

[AlfatahB]

Created Datasource file and corresponding Test as well as Web documentation for google_cloudfunctions2_function.

If this PR is for Terraform, I acknowledge that I have:

• Searched through the issue tracker for an open issue that this either resolves or contributes to, commented on it to claim it, and written "fixes {url}" or "part of {url}" in this PR description. If there were no relevant open issues, I opened one and commented that I would like to work on it (not necessary for very small changes).
• Generated Terraform, and ran make test and make lint to ensure it passes unit and linter tests.
• Ensured that all new fields I added that can be set by a user appear in at least one example (for generated resources) or third_party test (for handwritten resources or update tests).
• Ran relevant acceptance tests (If the acceptance tests do not yet pass or you are unable to run them, please let your reviewer know).
• Read the Release Notes Guide before writing my release note below.

Release Note Template for Downstream PRs (will be copied)

`google_cloudfunctions2_function`

[modular-magician]

Hello! I am a robot who works on Magic Modules PRs.

I've detected that you're a community contributor. @rileykarson, a repository maintainer, has been assigned to assist you and help review your changes.

❓ First time contributing? Click here for more details

---

Your assigned reviewer will help review your code by:

• Ensuring it's backwards compatible, covers common error cases, etc.
• Summarizing the change into a user-facing changelog note.
• Passes tests, either our "VCR" suite, a set of presubmit tests, or with manual test runs.

You can help make sure that review is quick by running local tests and ensuring they're passing in between each push you make to your PR's branch. Also, try to leave a comment with each push you make, as pushes generally don't generate emails.

If your reviewer doesn't get back to you within a week after your most recent change, please feel free to leave a comment on the issue asking them to take a look! In the absence of a dedicated review dashboard most maintainers manage their pending reviews through email, and those will sometimes get lost in their inbox.

---

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 5 files changed, 328 insertions(+), 2 deletions(-))
Terraform Beta: Diff ( 5 files changed, 328 insertions(+), 2 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2170
Passed tests 1928
Skipped tests: 235
Failed tests: 7

Action taken

Triggering VCR tests in RECORDING mode for the tests that failed during VCR. Click here to see the failed tests

TestAccComputeInstance_soleTenantNodeAffinities|TestAccPrivatecaCertificateAuthority_privatecaCertificateAuthoritySubordinateExample|TestAccFirebaserulesRelease_BasicRelease|TestAccSqlDatabaseInstance_mysqlMajorVersionUpgrade|TestAccCGCSnippet_eventarcWorkflowsExample|TestAccDataSourceGoogleCloudFunctions2Function_basic|TestAccDataSourceGoogleServiceAccountIdToken_impersonation

[modular-magician]

Tests passed during RECORDING mode:
TestAccPrivatecaCertificateAuthority_privatecaCertificateAuthoritySubordinateExample[Debug log]
TestAccFirebaserulesRelease_BasicRelease[Debug log]
TestAccSqlDatabaseInstance_mysqlMajorVersionUpgrade[Debug log]
TestAccCGCSnippet_eventarcWorkflowsExample[Debug log]
TestAccDataSourceGoogleCloudFunctions2Function_basic[Debug log]
TestAccDataSourceGoogleServiceAccountIdToken_impersonation[Debug log]

Tests failed during RECORDING mode:
TestAccComputeInstance_soleTenantNodeAffinities[Error message] [Debug log]

Please fix these to complete your PR
View the build log or the debug log for each test

[AlfatahB]

@rileykarson Can you please review this PR?

[rileykarson]

Oh, see https://github.com/GoogleCloudPlatform/magic-modules/blob/main/.ci/RELEASE_NOTES_GUIDE.md for details on formatting the release notes for your change as well!

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 5 files changed, 163 insertions(+), 2 deletions(-))
Terraform Beta: Diff ( 5 files changed, 163 insertions(+), 2 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2172
Passed tests 1925
Skipped tests: 238
Failed tests: 9

Action taken

Triggering VCR tests in RECORDING mode for the tests that failed during VCR. Click here to see the failed tests

TestAccVPCAccessConnector_vpcAccessConnectorSharedVPCExample|TestAccVPCAccessConnector_cloudrunVPCAccessConnectorExample|TestAccVPCAccessConnector_vpcAccessConnectorExample|TestAccComputeInstance_soleTenantNodeAffinities|TestAccCloudRunService_cloudRunServiceStaticOutboundExample|TestAccCloudFunctionsFunction_vpcConnector|TestAccCGCSnippet_eventarcWorkflowsExample|TestAccAppEngineStandardAppVersion_update|TestAccSqlDatabaseInstance_mysqlMajorVersionUpgrade

[modular-magician]

Tests passed during RECORDING mode:
TestAccSqlDatabaseInstance_mysqlMajorVersionUpgrade[Debug log]

Tests failed during RECORDING mode:
TestAccVPCAccessConnector_vpcAccessConnectorSharedVPCExample[Error message] [Debug log]
TestAccVPCAccessConnector_cloudrunVPCAccessConnectorExample[Error message] [Debug log]
TestAccVPCAccessConnector_vpcAccessConnectorExample[Error message] [Debug log]
TestAccComputeInstance_soleTenantNodeAffinities[Error message] [Debug log]
TestAccCloudRunService_cloudRunServiceStaticOutboundExample[Error message] [Debug log]
TestAccCloudFunctionsFunction_vpcConnector[Error message] [Debug log]
TestAccCGCSnippet_eventarcWorkflowsExample[Error message] [Debug log]
TestAccAppEngineStandardAppVersion_update[Error message] [Debug log]

Please fix these to complete your PR
View the build log or the debug log for each test

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 5 files changed, 167 insertions(+), 2 deletions(-))
Terraform Beta: Diff ( 5 files changed, 167 insertions(+), 2 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2172
Passed tests 1929
Skipped tests: 238
Failed tests: 5

Action taken

Triggering VCR tests in RECORDING mode for the tests that failed during VCR. Click here to see the failed tests

TestAccSqlDatabaseInstance_mysqlMajorVersionUpgrade|TestAccFirebaserulesRelease_BasicRelease|TestAccComputeInstance_soleTenantNodeAffinities|TestAccCGCSnippet_eventarcWorkflowsExample|TestAccDataSourceGoogleServiceAccountJwt

[modular-magician]

Tests passed during RECORDING mode:
TestAccSqlDatabaseInstance_mysqlMajorVersionUpgrade[Debug log]
TestAccFirebaserulesRelease_BasicRelease[Debug log]
TestAccDataSourceGoogleServiceAccountJwt[Debug log]

Tests failed during RECORDING mode:
TestAccComputeInstance_soleTenantNodeAffinities[Error message] [Debug log]
TestAccCGCSnippet_eventarcWorkflowsExample[Error message] [Debug log]

Please fix these to complete your PR
View the build log or the debug log for each test

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 5 files changed, 177 insertions(+), 2 deletions(-))
Terraform Beta: Diff ( 5 files changed, 177 insertions(+), 2 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2172
Passed tests 1932
Skipped tests: 238
Failed tests: 2

Action taken

Triggering VCR tests in RECORDING mode for the tests that failed during VCR. Click here to see the failed tests

TestAccComputeInstance_soleTenantNodeAffinities|TestAccSqlDatabaseInstance_mysqlMajorVersionUpgrade

[modular-magician]

Tests passed during RECORDING mode:
TestAccSqlDatabaseInstance_mysqlMajorVersionUpgrade[Debug log]

Tests failed during RECORDING mode:
TestAccComputeInstance_soleTenantNodeAffinities[Error message] [Debug log]

Please fix these to complete your PR
View the build log or the debug log for each test

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 5 files changed, 183 insertions(+), 2 deletions(-))
Terraform Beta: Diff ( 5 files changed, 183 insertions(+), 2 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Hi! I'm the modular magician. Your PR generated some diffs in downstreams - here they are.

Diff report:

Terraform GA: Diff ( 5 files changed, 183 insertions(+), 2 deletions(-))
Terraform Beta: Diff ( 5 files changed, 183 insertions(+), 2 deletions(-))
TF Validator: Diff ( 2 files changed, 3 insertions(+), 3 deletions(-))

[modular-magician]

Tests analytics

Total tests: 2172
Passed tests 1930
Skipped tests: 238
Failed tests: 4

Action taken

Triggering VCR tests in RECORDING mode for the tests that failed during VCR. Click here to see the failed tests

TestAccFirebaserulesRelease_BasicRelease|TestAccComputeInstance_soleTenantNodeAffinities|TestAccCGCSnippet_eventarcWorkflowsExample|TestAccSqlDatabaseInstance_mysqlMajorVersionUpgrade

[modular-magician]

Tests passed during RECORDING mode:
TestAccFirebaserulesRelease_BasicRelease[Debug log]
TestAccSqlDatabaseInstance_mysqlMajorVersionUpgrade[Debug log]

Tests failed during RECORDING mode:
TestAccComputeInstance_soleTenantNodeAffinities[Error message] [Debug log]
TestAccCGCSnippet_eventarcWorkflowsExample[Error message] [Debug log]

Please fix these to complete your PR
View the build log or the debug log for each test

[AlfatahB]

@rileykarson I've made the changes as suggested. Can you please review these changes?

[AlfatahB]

@rileykarson Could you please merge this PR?