* Bump metadata agent version to 0.2-0.0.21-1.
    * Expand the metadata agent's access to all API groups.
    * Remove metadata agent config maps in favor of command line flags.
    * Update the metadata agent's liveness probe to a new /healthz handler.
    * Logging Agent Improvements
    * Bump logging agent version to 0.2-1.5.33-1-k8s-1.

- All resources within the `rbac.authorization.k8s.io/v1alpha1` and `rbac.authorization.k8s.io/v1beta1` API groups are deprecated in favor of `rbac.authorization.k8s.io/v1`, and will no longer be served in v1.20. ([#84758](https://github.com/kubernetes/kubernetes/pull/84758), [@liggitt](https://github.com/liggitt))

- kube-apiserver
  - The `--service-account-api-audiences` flag is deprecated in favor of `--api-audiences`. The old flag is accepted with a warning but will be removed in a future release. ([#70105](https://github.com/kubernetes/kubernetes/pull/70105), [@mikedanese](https://github.com/mikedanese))

  - The `/swaggerapi/*` schema docs, deprecated since 1.7, have been removed in favor of the /openapi/v2 schema docs. ([#72924](https://github.com/kubernetes/kubernetes/pull/72924), [@liggitt](https://github.com/liggitt))

 - The `batch/v2alpha1.CronJob` is deprecated in favor of `batch/v1beta1`.

 - The `batch/v2alpha1.ScheduledJob` was removed. Use `batch/v1beta1.CronJob` instead.

### Auth

 - The RBAC v1alpha1 API group is deprecated in favor of RBAC v1.

- Delete deprecated `service.beta.kubernetes.io/azure-load-balancer-mixed-protocols` mixed procotol annotation in favor of the MixedProtocolLBService feature ([#97096](https://github.com/kubernetes/kubernetes/pull/97096), [@nilo19](https://github.com/nilo19)) [SIG Cloud Provider]

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- `apiserver_dropped_requests` is dropped from this release since `apiserver_request_total` can now be used to track dropped requests. `etcd_object_counts` is also removed in favor of `apiserver_storage_objects`. `apiserver_registered_watchers` is also removed in favor of `apiserver_longrunning_requests`. ([#110337](https://github.com/kubernetes/kubernetes/pull/110337), [@logicalhan](https://github.com/logicalhan))

  - The flag `--experimental-control-plane` is now deprecated in favor of  `--control-plane`. The flag `--experimental-upload-certs` is now deprecated in favor of `--upload-certs` ([#78452](https://github.com/kubernetes/kubernetes/pull/78452),...

- Removed `PodOverhead` feature gate as the feature is in GA since `v1.24`. ([#112579](https://github.com/kubernetes/kubernetes/pull/112579), [@SergeyKanzhelev](https://github.com/SergeyKanzhelev))
- Removing Windows Server, Version 20H2 flavors from various container images. ([#112924](https://github.com/kubernetes/kubernetes/pull/112924), [@marosset](https://github.com/marosset))