These metrics can be used to monitor the health of the Encryption Configuration Controller and to troubleshoot any issues that may arise during automatic reloading of encryption configuration. ([#119008](https://github.com/kubernetes/kubernetes/pull/119008), [@nilekhc](https://github.com/nilekhc))

- Shared informers now correctly propagate whether they are synced or not. Individual informer handlers may now check if they are synced or not (new `HasSynced` method). Library support is added to assist controllers in tracking whether their own work is completed for items in the initial list (`AsyncTracker`). ([#113985](https://github.com/kubernetes/kubernetes/pull/113985), [@lavalamp](https://github.com/lavalamp))

- No-op and GC related updates to cluster trust bundles no longer require attest authorization when the `ClusterTrustBundleAttest` plugin is enabled. ([#120779](https://github.com/kubernetes/kubernetes/pull/120779), [@enj](https://github.com/enj))

- Multiple Kubernetes clusters can now share the same resource group
    - When upgrading from previous releases, issues will arise with public IPs if multiple clusters share the same resource group. To solve these problems, make the following changes to the cluster: