- Replace scale down forbidden window with scale down stabilization window. Rather than waiting a fixed period of time between scale downs HPA now scales down to the highest recommendation it during the scale down stabilization window. ([#68122](https://github.com/kubernetes/kubernetes/pull/68122), [@krzysztof-jastrzebski](https://github.com/krzysztof-jastrzebski))...

* The ability to use kubectl scale jobs is deprecated. All other scale operations remain in place, but the ability to scale jobs will be removed in a future release.  ([#60139](https://github.com/kubernetes/kubernetes/pull/60139), [@soltysh](https://github.com/soltysh))

- 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:

 - Fixes a bug defining a default value for a replicas field in a custom resource definition that has the scale subresource enabled ([#90020](https://github.com/kubernetes/kubernetes/pull/90020), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, CLI, Cloud Provider, Cluster Lifecycle and Instrumentation]

- The Scheduler did not run the plugin Score method when its PreScore method returned a Skip status. In other words, the PreScore/Score plugin could return a Skip status in PreScore if the plugin did nothing in Score for that Pod. ([#115652](https://github.com/kubernetes/kubernetes/pull/115652), [@AxeZhan](https://github.com/AxeZhan))

- Return error when the scoring plugin returns score out of range `[0, 100]`. ([#81015](https://github.com/kubernetes/kubernetes/pull/81015), [@draveness](https://github.com/draveness))
- Use a named array instead of a score array in normalizing-score phase. ([#80901](https://github.com/kubernetes/kubernetes/pull/80901), [@draveness](https://github.com/draveness))

## Changelog since v1.18.14

## Changes by Kind

### Bug or Regression

- Fix Azure file share not deleted issue when the namespace is deleted ([#97417](https://github.com/kubernetes/kubernetes/pull/97417), [@andyzhangx](https://github.com/andyzhangx)) [SIG Cloud Provider and Storage]

    *   The view role includes read permissions on poddisruptionbudget.policy resources.
*   RBAC rules can now match the same subresource on any resource using the form `*/(subresource)`. For example, `*/scale` matches requests to `replicationcontroller/scale`. ([#53722](https://github.com/kubernetes/kubernetes/pull/53722),[ @deads2k](https://github.com/deads2k))

- Fix: statle smb mount issue when smb file share is deleted and then unmount ([#121851](https://github.com/kubernetes/kubernetes/pull/121851), [@andyzhangx](https://github.com/andyzhangx)) [SIG Storage]
- Fixed a regression since 1.27.0 in scheduler framework when running score plugins. 
  The `skippedScorePlugins` number might be greater than `enabledScorePlugins`, 

  that provide new subcommands. Refer to the documentation for more information.

- `kubectl rollout` and `rollback` now support StatefulSet.

- `kubectl scale` now uses the Scale subresource for kinds in the apps/v1beta2 group.

- `kubectl create configmap` and `kubectl create secret` subcommands now support
  the `--append-hash` flag, which enables unique but deterministic naming for