Add bigquery connection of type CLOUD_RESOURCE & make other examples GA.

[modular-magician]

Add connection of type cloud_resource to google_bigquery_connection. Fixes hashicorp/terraform-provider-google#11671

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Release Note Template for Downstream PRs (will be copied)

bigquery connection: Added connection of type cloud_resource for `google_bigquery_connection`

bigquery connection: Made `google_bigquery_connection` part of GA terraform provider.

Derived from GoogleCloudPlatform/magic-modules#6020