- Added a warning when alpha metrics are used with emulated versions. ([#132276](https://github.com/kubernetes/kubernetes/pull/132276), [@michaelasp](https://github.com/michaelasp)) [SIG API Machinery and Architecture]

- Fixed fake client to accept request without metadata.name to better emulate behavior of actual client. ([#126727](https://github.com/kubernetes/kubernetes/pull/126727), [@jpbetz](https://github.com/jpbetz))

- When updating a CRD, per-expression cost limit check are now skipped for `x-kubernetes-validations` rules of versions that are not mutated. ([#121460](https://github.com/kubernetes/kubernetes/pull/121460), [@jiahuif](https://github.com/jiahuif))
- `CSINodeExpandSecret` feature has been promoted to `GA` in this release and is enabled

        * At Metadata audit level or higher, an annotation with key "mutation.webhook.admission.k8s.io/round_{round idx}_index_{order idx}" gets logged with JSON payload indicating a webhook gets invoked for given request and whether it mutated the object or not.