dont hardcode VERIFY_WEIGHTS

[andytwigg]

Resolves #<issue_number_goes_here>

It's a good idea to open an issue first for discussion.

Reference

Colab Notebook

Checklist

• I have added all the necessary unit tests for my change.
• I have verified that my change does not break existing code and all unit tests pass.
• I have added all appropriate doc-strings/documentation.
• My PR is based on the latest changes of the main branch (if unsure, rebase the code).
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[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 improves configuration flexibility by allowing the VERIFY_WEIGHTS setting to be controlled via environment variables. By implementing a default value pattern, it ensures backward compatibility while enabling users to override the behavior as needed.

Highlights

• Configuration Flexibility: Updated the VERIFY_WEIGHTS environment variable to support external overrides while maintaining a default value of 'true'.

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[gemini-code-assist]

Code Review

This pull request updates the 'mlperf_base.sh' recipe to make the 'VERIFY_WEIGHTS' environment variable configurable, defaulting to 'true' if it is not already set. There are no review comments, and I have no additional feedback to provide.