- Reduce critical section in watchcache to fix kube-apiserver scalability under heavy load of list requests ([#122027](https://github.com/kubernetes/kubernetes/pull/122027), [@wojtek-t](https://github.com/wojtek-t)) [SIG API Machinery]

## Dependencies

func (c *SiteReplicationSys) newConcErr(errMap map[string]error, actionName string) error {
	return concErr{
		errMap:     errMap,
		summaryErr: c.toErrorFromErrMap(errMap, actionName),
	}
}

// concDo calls actions concurrently. selfActionFn is run for the current
// cluster and peerActionFn is run for each peer replication cluster.

- Client-go: Optimized leaders renewing leases by updating leader lock optimistically without getting the record from the API server first. Also, a new metric `leader_election_slowpath_total` was added to allow users to monitor how many leader elections are updated non-optimistically.
   ([#122069](https://github.com/kubernetes/kubernetes/pull/122069), [@linxiulei](https://github.com/linxiulei))
- Locked the GA feature-gate `ConsistentHTTPGetHandlers` to default.

- Added support for RSA and ECDSA format keys in preflight check on `kubeadm`. ([#112508](https://github.com/kubernetes/kubernetes/pull/112508), [@SataQiu](https://github.com/SataQiu))
- Allowed `Label` section in vSphere e2e cloud provider configuration. ([#112427](https://github.com/kubernetes/kubernetes/pull/112427), [@gnufied](https://github.com/gnufied))

- Kubeadm: Switched kubeadm to start using the CRI client library instead of shelling out of the `crictl` binary
  for actions against a CRI endpoint. The kubeadm deb/rpm packages will continue to install the `cri-tools`
  package for one more release, but in you must adapt your scripts to install `crictl` manually from

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### Auth

- Added `kubectl auth can-i --list` option, which allows users to  know what actions they can do in specific namespaces. ([#64820](https://github.com/kubernetes/kubernetes/pull/64820), [@WanLinghao](https://github.com/WanLinghao))

## Changelog since v1.25.1

## Changes by Kind

### Bug or Regression

- Allow Label section in vsphere e2e cloudprovider configuration ([#112478](https://github.com/kubernetes/kubernetes/pull/112478), [@gnufied](https://github.com/gnufied)) [SIG Storage and Testing]

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* The node authorizer now allows nodes to request service account tokens for the service accounts of pods running on them. This allows agents using the node identity to take actions on behalf of local pods. ([#55019](https://github.com/kubernetes/kubernetes/pull/55019), [@mikedanese](https://github.com/mikedanese))