[release-26.3] Add DCGM exporter pod metadata enrichment API

[github-actions]

🤖 Automated backport of #2406 to release-26.3

⚠️ This PR has merge conflicts that need manual resolution.

Original PR: #2406
Original Author: @karthikvetrivel

Cherry-picked commits (1):

• 146f17f Add DCGM exporter pod metadata enrichment API

Next Steps:

1. Review the conflicts in the "Files changed" tab
2. Check out this branch locally: git fetch origin backport-2406-to-release-26.3 && git checkout backport-2406-to-release-26.3
3. Resolve conflicts manually
4. Push the resolution: git push --force-with-lease origin backport-2406-to-release-26.3

---

Instructions for resolving conflicts

git fetch origin backport-2406-to-release-26.3
git checkout backport-2406-to-release-26.3
# Resolve conflicts in your editor
git add .
git commit
git push --force-with-lease origin backport-2406-to-release-26.3

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