[Umbrella] Infrastructure upgrading and enhancement(release-1.17)

[RainbowMango]

Summary:

This issue is used to track the iteration tasks of infrastructure upgrading.

Iteration Tasks:

• Adopt CLOWarden to manage access.
  • Registering a GitHub App under organization karmada-io. (@RainbowMango)
  • Setup the policy and initial configuration. (@RainbowMango, Setup Karmada github organization management #167)
  • Enable CLOWarden service
• Prow bot upgrade
  • Introduce new labels for testing PRs. (#5506)
  • Add do-not-merge/invalid-commit-message to tide. (After invalidcommitmsg flags some node.js dependabot commits as invalid kubernetes-sigs/prow#571)
  • Enable cherrypicker external plugin for cherry-pick automation.
    • Consider also enable cherry-pick-approved or cherry-pick-unapproved plugin for label automation
• Adot automatic merge strategy(not sure yet)(#6497)