feat(cloud_sql): Add samples for Google/Customer-managed CAS instances.

[feng-zhe]

Description

Fixes #410627056

Note: If you are not associated with Google, open an issue for discussion before submitting a pull request.

Checklist

Readiness

• Yes, merge this PR after it is approved
• No, don't merge this PR after it is approved

Style

• My sample follows the rules described for Terraform in the Effective Samples style guide
• My sample follows the other requirements and best practices in the Contributing
  guide

Testing

• I have performed tests described in the Contributing guide:

  • Tests pass: terraform apply (See b/410627056#comment2)
  • Lint pass: terraform fmt check

Intended location

• Yes, this sample will be (or already is) included on cloud.google.com
  Location(s):

• No, this sample won't be included on cloud.google.com
  Reason:

API enablement

• If the sample needs an API enabled to pass testing, I have added the service to the Test setup file

Review

• If this sample adds a new directory, I have added codeowners to the CODEOWNERS file

[snippet-bot]

Here is the summary of changes.

You are about to add 21 region tags.

• cloud_sql/mysql_instance_customer_managed_cas_ca/main.tf:16, tag cloud_sql_instance_service_identity
• cloud_sql/mysql_instance_customer_managed_cas_ca/main.tf:23, tag privateca_ca_pool_suffix
• cloud_sql/mysql_instance_customer_managed_cas_ca/main.tf:31, tag cloud_sql_mysql_instance_ca_pool
• cloud_sql/mysql_instance_customer_managed_cas_ca/main.tf:43, tag cloud_sql_mysql_instance_ca
• cloud_sql/mysql_instance_customer_managed_cas_ca/main.tf:81, tag cloud_sql_mysql_instance_iam_granting
• cloud_sql/mysql_instance_customer_managed_cas_ca/main.tf:90, tag cloud_sql_mysql_instance_customer_managed_cas_ca
• cloud_sql/mysql_instance_google_managed_cas_ca/main.tf:17, tag cloud_sql_mysql_instance_google_managed_cas_ca
• cloud_sql/postgres_instance_customer_managed_cas_ca/main.tf:16, tag cloud_sql_instance_service_identity
• cloud_sql/postgres_instance_customer_managed_cas_ca/main.tf:23, tag privateca_ca_pool_suffix
• cloud_sql/postgres_instance_customer_managed_cas_ca/main.tf:31, tag cloud_sql_mysql_instance_ca_pool
• cloud_sql/postgres_instance_customer_managed_cas_ca/main.tf:43, tag cloud_sql_postgres_instance_ca
• cloud_sql/postgres_instance_customer_managed_cas_ca/main.tf:81, tag cloud_sql_postgres_instance_iam_granting
• cloud_sql/postgres_instance_customer_managed_cas_ca/main.tf:90, tag cloud_sql_postgres_instance_google_managed_cas_ca
• cloud_sql/postgres_instance_google_managed_cas_ca/main.tf:17, tag cloud_sql_postgres_instance_google_managed_cas_ca
• cloud_sql/sqlserver_instance_customer_managed_cas_ca/main.tf:16, tag cloud_sql_instance_service_identity
• cloud_sql/sqlserver_instance_customer_managed_cas_ca/main.tf:23, tag privateca_ca_pool_suffix
• cloud_sql/sqlserver_instance_customer_managed_cas_ca/main.tf:31, tag cloud_sql_mysql_instance_ca_pool
• cloud_sql/sqlserver_instance_customer_managed_cas_ca/main.tf:43, tag cloud_sql_sqlserver_instance_ca
• cloud_sql/sqlserver_instance_customer_managed_cas_ca/main.tf:81, tag cloud_sql_sqlserver_instance_iam_granting
• cloud_sql/sqlserver_instance_customer_managed_cas_ca/main.tf:90, tag cloud_sql_sqlserver_instance_require_ssl
• cloud_sql/sqlserver_instance_google_managed_cas_ca/main.tf:17, tag cloud_sql_sqlserver_instance_require_ssl

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[glasnt]

Initial review, pending CI test results (may not pass, privateca tests need to skip application tests, may also apply here)

Any requested changes also should be reviewed for relevance to other instances in this PR (there are six files, I didn't duplicate the same comment six times, for example.)

[glasnt]

/gcbrun

[feng-zhe]

Initial review, pending CI test results (may not pass, privateca tests need to skip application tests, may also apply here)

Any requested changes also should be reviewed for relevance to other instances in this PR (there are six files, I didn't duplicate the same comment six times, for example.)

BTW, I updated the description to indicate these samples will be included in gcp public doc. We have separate public docs for different DB types, so I assumed we need different files for that. And I see we do so for postgres_instance_ssl_cert, mysql_instance_ssl_cert, and sqlserver_instance_ssl_cert

[feng-zhe]

Friendly ping. Thanks.

[iennae]

/gcbrun

[iennae]

/gcbrun

[iennae]

/gcbrun

[iennae]

/gcbrun