ci: scope down GitHub Token permissions

[AdnaneKhan]

Scope Down GitHub Token Permissions

This PR updates GitHub Actions workflows to use minimal required permissions instead of the default elevated permissions.

Why This Matters

Following the principle of least privilege, workflows should only have the specific permissions they need to function.

Changes

This PR adds explicit permissions: blocks to workflows that currently rely on default permissions, scoping them down to only what's required for their operations.

Please review the changes to ensure the specified permissions match your workflow requirements.

[eks-distro-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

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[eks-distro-bot]

Hi @AdnaneKhan. Thanks for your PR.

I'm waiting for a aws member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.79%. Comparing base (59f6997) to head (691cbdf).

Additional details and impacted files

@@           Coverage Diff           @@
##             main   #10213   +/-   ##
=======================================
  Coverage   68.79%   68.79%           
=======================================
  Files         679      679           
  Lines       51230    51230           
=======================================
  Hits        35244    35244           
  Misses      14205    14205           
  Partials     1781     1781           

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