feat(secretmanager): Added samples for creating secret with CMEK and Pub/Sub Topic

[dhavalbhensdadiya-crest]

As part of this feature, we have added global and regional samples for below features:

1. Create secret with CMEK
2. Create secret with Topic

Please merge this PR once approved

[snippet-bot]

Here is the summary of changes.

You are about to add 24 region tags.

• secretmanager/src/create_regional_secret_with_cmek.php:28, tag secretmanager_create_regional_secret_with_cmek
• secretmanager/src/create_regional_secret_with_expiration.php:28, tag secretmanager_create_regional_secret_with_expiration
• secretmanager/src/create_regional_secret_with_topic.php:28, tag secretmanager_create_regional_secret_with_topic
• secretmanager/src/create_secret_with_cmek.php:28, tag secretmanager_create_secret_with_cmek
• secretmanager/src/create_secret_with_expiration.php:28, tag secretmanager_create_secret_with_expiration
• secretmanager/src/create_secret_with_topic.php:28, tag secretmanager_create_secret_with_topic
• secretmanager/src/delete_regional_secret_expiration.php:28, tag secretmanager_delete_regional_secret_expiration
• secretmanager/src/delete_regional_secret_using_etag.php:28, tag secretmanager_delete_regional_secret_using_etag
• secretmanager/src/delete_secret_expiration.php:28, tag secretmanager_delete_secret_expiration
• secretmanager/src/delete_secret_using_etag.php:28, tag secretmanager_delete_secret_using_etag
• secretmanager/src/destroy_regional_secret_version_using_etag.php:28, tag secretmanager_destroy_regional_secret_version_using_etag
• secretmanager/src/destroy_secret_version_using_etag.php:28, tag secretmanager_destroy_secret_version_using_etag
• secretmanager/src/disable_regional_secret_version_using_etag.php:28, tag secretmanager_disable_regional_secret_version_using_etag
• secretmanager/src/disable_secret_version_using_etag.php:28, tag secretmanager_disable_secret_version_using_etag
• secretmanager/src/enable_regional_secret_version_using_etag.php:28, tag secretmanager_enable_regional_secret_version_using_etag
• secretmanager/src/enable_secret_version_using_etag.php:28, tag secretmanager_enable_secret_version_using_etag
• secretmanager/src/list_regional_secret_versions_with_filter.php:28, tag secretmanager_list_regional_secret_versions_with_filter
• secretmanager/src/list_regional_secrets_with_filter.php:28, tag secretmanager_list_regional_secrets_with_filter
• secretmanager/src/list_secret_versions_with_filter.php:28, tag secretmanager_list_secret_versions_with_filter
• secretmanager/src/list_secrets_with_filter.php:28, tag secretmanager_list_secrets_with_filter
• secretmanager/src/update_regional_secret_using_etag.php:28, tag secretmanager_update_regional_secret_using_etag
• secretmanager/src/update_regional_secret_with_expiration.php:28, tag secretmanager_update_regional_secret_with_expiration
• secretmanager/src/update_secret_using_etag.php:28, tag secretmanager_update_secret_using_etag
• secretmanager/src/update_secret_with_expiration.php:28, tag secretmanager_update_secret_with_expiration

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[gemini-code-assist]

Summary of Changes

Hello @dhavalbhensdadiya-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 new PHP samples for Google Cloud Secret Manager. These samples demonstrate how to create secrets with CMEK, associate them with Pub/Sub topics, manage regional secrets, utilize ETags for concurrency control, handle secret expiration, and filter secrets and their versions. The changes enhance the Secret Manager's functionality by providing more comprehensive examples for various use cases.

Highlights

• New Samples: Added samples for creating secrets with CMEK and Pub/Sub topics in PHP.
• Regional Support: Introduced regional samples for secret management, including creating, updating, deleting, and managing secret versions.
• ETag Usage: Demonstrated the use of ETags for optimistic concurrency control in secret and secret version management.
• Expiration Management: Added samples for managing secret expiration using TTL.
• Filtering: Introduced samples for listing secrets and secret versions with filters.

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[gemini-code-assist]

Code Review

This pull request adds several new PHP samples for Google Secret Manager, demonstrating features like creating secrets with CMEK, Pub/Sub topics, and expiration settings. The changes also include corresponding test cases. The implementation is generally good, but I've identified several areas for improvement related to code consistency, documentation clarity, and minor formatting issues. Addressing these points will enhance the quality and maintainability of the new samples.