Revert removing RetryMetricsHeader in presigned requests

[yuxiang-zhang]

Description

With the update to [email protected], API server requests containing URLs presigned by sts.PresignClient fail with error generating token: failed to presign caller identity: not found, RetryMetricsHeader.

Previous issue #7486 has this RetryMetricsHeader header removed. This PR reverts that change.

Checklist

• Added tests that cover your change (if possible)
• Added/modified documentation as required (such as the README.md, or the userdocs directory)
• Manually tested
• Made sure the title of the PR is a good description that can go into the release notes
• (Core team) Added labels for change area (e.g. area/nodegroup) and kind (e.g. kind/improvement)

BONUS POINTS checklist: complete for good vibes and maybe prizes?! 🤯

• Backfilled missing tests for code in same general area 🎉
• Refactored something and made the world a better place 🌟

[a-hilaly]

👍