fix: flaky system tests for resumable_media

[Pulkit0110]

This PR aims to fix the flaky system tests for resumable media

[gemini-code-assist]

Summary of Changes

Hello @Pulkit0110, 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 resolves flakiness in the resumable_media system tests by adapting the MD5 hash generation logic to be compatible with Python 3.9 and later. The change involves conditionally adding the usedforsecurity=False argument to hashlib.md5 calls, ensuring that tests run consistently across different Python versions without encountering errors related to the updated hashlib behavior.

Highlights

• Python Version Compatibility: Introduced conditional logic to MD5 hash calculations to ensure compatibility with Python 3.9 and newer versions, which require the usedforsecurity=False parameter for hashlib.md5 when not used for cryptographic security.
• Test Stability: Addressed flakiness in system tests for resumable_media by updating how MD5 hashes are generated, specifically for empty or general data, to prevent failures on newer Python environments.
• Module Imports: Added the sys module import to both test_download.py and test_upload.py to facilitate Python version checking.

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[gemini-code-assist]

Code Review

This pull request addresses flaky system tests for resumable media by updating the usage of hashlib.md5 to be compatible with Python 3.9+ in FIPS-enabled environments. The changes correctly add the usedforsecurity=False parameter when running on newer Python versions. My review includes suggestions to make the implementation more concise and reduce repetition. Overall, the fix is correct and well-targeted.

[chalmerlowe]

LGTM