feat(clustering/rpc): add dp labels support

[chronolaw]

Summary

KAG-5973
KAG-5935

Checklist

• The Pull Request has tests
• A changelog file has been created under changelog/unreleased/kong or skip-changelog label added on PR if changelog is unnecessary. README.md
• There is a user-facing docs PR against https://github.com/Kong/docs.konghq.com - PUT DOCS PR HERE

Issue reference

Fix #[issue number]

[team-gateway-bot]

Cherry-pick failed for master, because it was unable to cherry-pick the commit(s).

Please cherry-pick the changes locally.

git remote add upstream https://github.com/kong/kong-ee
git fetch upstream master
git worktree add -d .worktree/cherry-pick-14046-to-master-to-upstream upstream/master
cd .worktree/cherry-pick-14046-to-master-to-upstream
git checkout -b cherry-pick-14046-to-master-to-upstream
ancref=$(git merge-base c77a1786f2792bb1255b411281a7a9b6473fe469 9d19fbeb5d810044367b697893aa63272a71dd9f)
git cherry-pick -x $ancref..9d19fbeb5d810044367b697893aa63272a71dd9f