feat(secretmanager): Adding expiretime samples

[khilan-crest]

Adding expiretime samples

[snippet-bot]

Here is the summary of changes.

You are about to add 15 region tags.

• secretmanager/api/SecretManager.Samples/CreateRegionalSecretWithExpiration.cs:17, tag secretmanager_create_regional_secret_with_expire_time
• secretmanager/api/SecretManager.Samples/CreateSecretWithExpiration.cs:17, tag secretmanager_create_secret_with_expiration
• secretmanager/api/SecretManager.Samples/DeleteRegionalSecretAnnotation.cs:17, tag secretmanager_delete_regional_secret_annotation
• secretmanager/api/SecretManager.Samples/DeleteRegionalSecretExpiration.cs:17, tag secretmanager_delete_regional_secret_expiration
• secretmanager/api/SecretManager.Samples/DeleteRegionalSecretLabel.cs:17, tag secretmanager_delete_regional_secret_label
• secretmanager/api/SecretManager.Samples/DeleteSecretAnnotation.cs:17, tag secretmanager_delete_secret_annotation
• secretmanager/api/SecretManager.Samples/DeleteSecretExpiration.cs:17, tag secretmanager_delete_secret_expiration
• secretmanager/api/SecretManager.Samples/DeleteSecretLabel.cs:17, tag secretmanager_delete_secret_label
• secretmanager/api/SecretManager.Samples/EditSecretLabel.cs:17, tag secretmanager_edit_secret_label
• secretmanager/api/SecretManager.Samples/ListSecretVersionsWithFilter.cs:17, tag secretmanager_list_secret_versions_with_filter
• secretmanager/api/SecretManager.Samples/ListSecretsWithFilter.cs:17, tag secretmanager_list_secrets_with_filter
• secretmanager/api/SecretManager.Samples/UpdateRegionalSecretExpiration.cs:17, tag secretmanager_update_regional_secret_expiration
• secretmanager/api/SecretManager.Samples/UpdateSecretExpiration.cs:17, tag secretmanager_update_secret_expiration
• secretmanager/api/SecretManager.Samples/createRegionalSecretWithCmek.cs:17, tag secretmanager_create_regional_secret_with_cmek
• secretmanager/api/SecretManager.Samples/createSecretWithCmek.cs:17, tag secretmanager_create_secret_with_cmek

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[gemini-code-assist]

Summary of Changes

Hello @khilan-crest, I'm Gemini Code Assist¹! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed!

This pull request introduces a comprehensive set of new sample code and corresponding integration tests for the Google Cloud Secret Manager client library. The additions cover various aspects of secret management, including lifecycle operations like setting and modifying expiration times, metadata management through annotations and labels, and advanced security features such as Customer-Managed Encryption Keys (CMEK). It also enhances the ability to query secrets and their versions using filtering capabilities, providing developers with more robust examples for interacting with the Secret Manager service.

Highlights

• Secret Expiration Management: New samples and corresponding tests have been added for creating, updating, and deleting secret expiration times for both global and regional secrets.
• Secret Metadata Management: Samples and tests are introduced for managing secret annotations (deletion) and secret labels (deletion and editing) for both global and regional secrets.
• Customer-Managed Encryption Keys (CMEK): New samples and tests enable the creation of secrets with Customer-Managed Encryption Keys (CMEK) for both global and regional secret configurations.
• Filtered Secret Listing: Functionality to list secrets and secret versions using specific filters has been added, complete with samples and tests.

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[gemini-code-assist]

Code Review

This pull request adds several new samples and corresponding tests for Secret Manager features, primarily focusing on secret expiration, CMEK, labels, and annotations. The changes are extensive, adding many new files. My review focuses on improving test robustness, fixing bugs in tests, and enhancing the clarity and consistency of the new sample code. I've identified a few issues, including brittle time-based assertions in tests, a resource leak bug in one test's cleanup logic, and some minor improvements for consistency and clarity in the sample code.