feat(storage): migrate files samples and tests

[angelcaamal]

Description

Fixes Internal: b/495532924

Note: Before submitting a pull request, please open an issue for discussion if you are not associated with Google.

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).

[gemini-code-assist]

Summary of Changes

Hello, 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 Storage Node.js samples by introducing a wide array of file manipulation functionalities. It provides new examples for common and advanced file operations, including various upload and download methods, file lifecycle management, and security features like signed URLs and object retention. The changes are accompanied by extensive system tests to validate the implementation of these new samples, ensuring their reliability and correctness.

Highlights

• New Google Cloud Storage File Samples: Introduced a comprehensive suite of new Node.js samples demonstrating various Google Cloud Storage file operations, including uploading, downloading, copying, moving, deleting, and managing metadata.
• Advanced File Management Features: Added samples for advanced GCS features such as configuring retry settings, generating signed URLs (V2 and V4), managing object retention policies, and handling soft-deleted objects and their versions.
• Comprehensive System Tests: Included robust system tests (files.test.js) to ensure the correctness and functionality of all new file management samples, covering a wide range of scenarios.
• Utility Scripts and Resources: Added a cleanup script for managing test resources and new resource files to support the sample execution and testing environment.

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[gemini-code-assist]

Code Review

This pull request introduces numerous new Node.js samples for Google Cloud Storage operations, covering file management (compose, copy, delete, download, move, rename), metadata handling, signed URL generation, object retention, and soft deletion. The package.json has been updated with new dependencies. The review comments highlight several areas for improvement: the cleanup script has issues with promise chaining and error handling, streamFileDownload.js and streamFileUpload.js contain race conditions and incorrect error handling due to improper await usage with streams, and downloadFile.js and uploadFileWithKmsKey.js have redundant error catching.