feat(secretmanager): Adding cmek samples

[khilan-crest]

Adding cmek samples

Fixes #

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Checklist

• I have followed guidelines from CONTRIBUTING.MD and Samples Style Guide
• Tests pass: npm test (see Testing)
• Lint pass: npm run lint (see Style)
• Required CI tests pass (see CI testing)
• These samples need a new API enabled in testing projects to pass (let us know which ones)
• These samples need a new/updated env vars in testing projects set to pass (let us know which ones)
• This pull request is from a branch created directly off of GoogleCloudPlatform/nodejs-docs-samples. Not a fork.
• This sample adds a new sample directory, and I updated the CODEOWNERS file with the codeowners for this sample
• This sample adds a new sample directory, and I created GitHub Actions workflow for this sample
• This sample adds a new Product API, and I updated the Blunderbuss issue/PR auto-assigner with the codeowners for this sample
• Please merge this PR for me once it is approved

Note: Any check with (dev), (experimental), or (legacy) can be ignored and should not block your PR from merging (see CI testing).

[snippet-bot]

Here is the summary of changes.

You are about to add 11 region tags.

• secret-manager/createSecretWithCmek.js:18, tag secretmanager_create_secret_with_cmek
• secret-manager/createSecretWithUserManagedReplicationPolicy.js:18, tag secretmanager_create_ummr_secret
• secret-manager/detachTagBinding.js:18, tag secretmanager_detach_tag_binding
• secret-manager/listSecretVersionsWithFilter.js:18, tag secretmanager_list_secret_versions_with_filter
• secret-manager/listSecretsWithFilter.js:18, tag secretmanager_list_secrets_with_filter
• secret-manager/listTagBindings.js:18, tag secretmanager_list_tag_bindings
• secret-manager/regional_samples/createRegionalSecretWithCmek.js:18, tag secretmanager_create_secret_with_cmek
• secret-manager/regional_samples/detachRegionalTag.js:18, tag secretmanager_detach_regional_tag
• secret-manager/regional_samples/listRegionalSecretVersionsWithFilter.js:18, tag secretmanager_list_regional_secret_versions_with_filter
• secret-manager/regional_samples/listRegionalSecretsWithFilter.js:18, tag secretmanager_list_regional_secrets_with_filter
• secret-manager/regional_samples/listRegionalTagBindings.js:18, tag secretmanager_list_regional_secret_tag_bindings

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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 significantly expands the Google Cloud Secret Manager Node.js samples by introducing a suite of new examples. These additions cover advanced secret creation options, such as using Customer-Managed Encryption Keys (CMEK) and user-managed replication policies, alongside enhanced capabilities for listing secrets and their versions with filters. Furthermore, new samples for managing tag bindings on secrets have been included, providing developers with more robust tools for organizing and securing their sensitive data within Google Cloud.

Highlights

• New Secret Creation Samples: Added samples demonstrating how to create secrets with Customer-Managed Encryption Keys (CMEK) for both global and regional secrets, and how to create secrets with user-managed replication policies.
• Enhanced Secret Listing and Filtering: Introduced new samples for listing secrets and secret versions, including the ability to apply filters to narrow down results, covering both global and regional contexts.
• Tag Binding Management Samples: Provided new samples for managing tag bindings on secrets, specifically for listing existing tag bindings and detaching them, applicable to both global and regional secrets.
• Test Suite Expansion: Updated the existing test suite to include comprehensive tests for all newly added Secret Manager samples, ensuring their correct functionality and integration.

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[gemini-code-assist]

Code Review

This pull request adds several new samples for Secret Manager, focusing on CMEK, user-managed replication, and filtering/tagging secrets. The changes are well-structured and the new functionality is covered by tests. I've identified a few areas for improvement, including a recurring pattern of redundant nested functions that can be simplified, a potential bug in handling optional arguments, and a minor error in a test assertion. Overall, this is a great addition.