ci: exclude few storage integration tests

[v-pratap]

Here is the issue created for this PR: #15845

[gemini-code-assist]

Summary of Changes

Hello @v-pratap, 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 aims to stabilize the continuous integration pipeline by temporarily excluding a set of storage integration tests that are currently causing issues. By preventing these tests from running, the CI process can proceed without being blocked, allowing developers to focus on resolving the identified problems in a separate effort.

Highlights

• Temporary Test Exclusion: Four specific storage integration tests (storage_bucket_iam_samples, bucket_acl_integration_test, bucket_integration_test, and default_object_acl_integration_test) have been temporarily excluded from the production integration test suite.
• Issue Linkage: This exclusion is a temporary measure, linked to issue Skip few integration-production-pr's integration tests #15845, and the tests are intended to be re-enabled once the underlying issue is resolved.

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[gemini-code-assist]

Code Review

This pull request disables several storage integration tests to address flakiness, as tracked in issue #15845. The change is correct in its approach. I've added one suggestion to improve the comment's clarity for future maintainers, providing immediate context for why the tests are disabled.

[gemini-code-assist]

For better context, it would be helpful to briefly state why these tests are being disabled, similar to the comments for other disabled tests in this list. This helps developers understand the reason for the exclusion without needing to navigate to the issue tracker.

Suggested change

	# TODO(#15845): Re-enable these tests once the issue is resolved.
	# TODO(#15845): Temporarily disabled due to flakiness. Re-enable once the issue is resolved.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.95%. Comparing base (46f7e8b) to head (6ab7316).

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #15846      +/-   ##
==========================================
+ Coverage   92.94%   92.95%   +0.01%     
==========================================
  Files        2458     2458              
  Lines      227585   227585              
==========================================
+ Hits       211531   211562      +31     
+ Misses      16054    16023      -31     

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