samples(Storage): Generalize move object sample for all buckets

[mahendra-google]

This PR contains changes in MoveObject sample to generalize it for all types of buckets. Please see b/429345064.

[gemini-code-assist]

Summary of Changes

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This pull request focuses on enhancing the MoveObject sample by generalizing its functionality. Previously, the sample was implicitly tied to hierarchical namespace (HNS) enabled buckets. The changes ensure that the sample, its documentation, and its corresponding tests are now universally applicable to any Google Cloud Storage bucket, thereby improving its versatility and ease of use for developers.

Highlights

• Generalize MoveObject Sample: The MoveObject sample code and its associated documentation have been updated to remove specific references to 'hierarchical namespace enabled buckets', making the sample applicable to all types of Google Cloud Storage buckets.
• Test Fixture Refinement: The StorageFixture.cs test helper class has been modified to remove the CollectHnsObject method, streamlining object collection in tests by using a more generic Collect method.

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[gemini-code-assist]

Code Review

This pull request correctly generalizes the MoveObject sample to work with all bucket types, removing the specific dependency on Hierarchical Namespace enabled buckets. The changes are reflected in the sample's code, comments, and tests, which now use a generic bucket. The removal of the unused CollectHnsObject helper method in StorageFixture.cs is also a good cleanup. I have one suggestion to improve the code's readability.