fix(storage): resolve transport and retry issues

[thiyaguk09]

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Fixes #<issue_number_goes_here> 🦕

[gemini-code-assist]

Code Review

This pull request refactors request handling and retry logic by transitioning from the common Service class to a specialized StorageTransport. Key changes include the introduction of granular idempotency logic for HTTP methods, improved encryption header management, and a custom parameter serializer. Review feedback identifies a high-severity race condition involving shared interceptors on the Gaxios instance and inconsistent return types in the response handler. Additionally, improvements were suggested regarding the efficiency of JSON parsing within retry loops and the safety of non-null assertions in encryption headers.