Replaced the panic statement with error in google_secret_manager_secret_version resource import function

[abheda-crest]

Replaced the panic statement with an error in the google_secret_manager_secret_version resource import function
fixes hashicorp/terraform-provider-google#9666

Release Note Template for Downstream PRs (will be copied)

secretmanager: replaced the panic block with an error in import function of `google_secret_manager_secret_version` resource

[modular-magician]

Hello! I am a robot. It looks like you are a: Community Contributor Googler Core Contributor. Tests will require approval to run.

@c2thorn, a repository maintainer, has been assigned to review your changes. If you have not received review feedback within 2 business days, please leave a comment on this PR asking them to take a look.

You can help make sure that review is quick by doing a self-review and by running impacted tests locally.

[modular-magician]

Hi there, I'm the Modular magician. I've detected the following information about your changes:

Diff report

Your PR generated some diffs in downstreams - here they are.

Terraform GA: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))
Terraform Beta: Diff ( 1 file changed, 1 insertion(+), 1 deletion(-))

[modular-magician]

Tests analytics

Total tests: 3037
Passed tests 2735
Skipped tests: 297
Affected tests: 5

Action taken

Found 5 affected test(s) by replaying old test recordings. Starting RECORDING based on the most recent commit. Click here to see the affected tests

TestAccMonitoringMonitoredProject_monitoringMonitoredProjectLongFormExample|TestAccMonitoringMonitoredProject_projectNumLongForm|TestAccMonitoringMonitoredProject_monitoringMonitoredProjectBasicExample|TestAccMonitoringMonitoredProject_projectNumShortForm|TestAccDataSourceGoogleServiceAccountAccessToken_basic

Get to know how VCR tests work

[modular-magician]

$\textcolor{green}{\textsf{Tests passed during RECORDING mode:}}$
TestAccMonitoringMonitoredProject_monitoringMonitoredProjectLongFormExample[Debug log]
TestAccMonitoringMonitoredProject_projectNumLongForm[Debug log]
TestAccMonitoringMonitoredProject_monitoringMonitoredProjectBasicExample[Debug log]
TestAccMonitoringMonitoredProject_projectNumShortForm[Debug log]
TestAccDataSourceGoogleServiceAccountAccessToken_basic[Debug log]

Rerun these tests in REPLAYING mode to catch issues

$\textcolor{green}{\textsf{No issues found for passed tests after REPLAYING rerun.}}$

---

$\textcolor{green}{\textsf{All tests passed!}}$
View the build log or the debug log for each test

[abheda-crest]

@c2thorn Could you please review and merge this PR?