* Improving the performance of Endpoint and EndpointSlice controllers by caching Service Selectors ([#84280](https://github.com/kubernetes/kubernetes/pull/84280), [@gongguan](https://github.com/gongguan))

### API Change

 - For all kinds in the API group version, a spec.selector default value is no longer
 available, because it's incompatible with `kubectl
 apply` and strategic merge patch. You must explicitly set the spec.selector value
 in your manifest. An object with a spec.selector value that does not match the labels in
 its spec.template is invalid.

 - Selector mutation is disabled for all kinds in the

fixLoginRegisterHeight() {\n    const $body = $('body')\n    const $selector = $(`${SELECTOR_LOGIN_BOX}, ${SELECTOR_REGISTER_BOX}`)\n\n    if ($body.hasClass(CLASS_NAME_IFRAME_MODE)) {\n      $body.css('height', '100%')\n      $('.wrapper').css('height', '100%')\n      $('html').css('height', '100%')\n    } else if ($selector.length === 0) {\n      $body.css('height', 'auto')\n      $('html').css('height', 'auto')\n    } else {\n      const boxHeight = $selector.height()\n\n      if ($body.css(this._config.panelAutoHeightMode)...

.25);\n      }\n    }\n  }\n\n  // stylelint-disable-next-line selector-no-qualifying-type\n  select.form-control {\n    @include form-validation-state-selector($state) {\n      @if $enable-validation-icons {\n        padding-right: $input-padding-x * 4 !important; // stylelint-disable-line declaration-no-important\n        background-position: right $input-padding-x * 2 center;\n      }\n    }\n  }\n\n  // stylelint-disable-next-line selector-no-qualifying-type\n  textarea.form-control {\n    @include...

ease-in-out}@media (prefers-reduced-motion:reduce){.form-control::-webkit-file-upload-button{-webkit-transition:none;transition:none}.form-control::file-selector-button{transition:none}}.form-control:hover:not(:disabled):not([readonly])::-webkit-file-upload-button{background-color:var(--bs-secondary-bg)}.form-control:hover:not(:disabled):not([readonly])::file-selector-button{background-color:var(--bs-secondary-bg)}.form-control-plaintext{display:block;width:100%;padding:.375rem 0;margin-bottom:0;line-height...

- The getters for the field name and typeDescription of the Reflector struct were renamed. ([#128035](https://github.com/kubernetes/kubernetes/pull/128035), [@alexanderstephan](https://github.com/alexanderstephan)) [SIG API Machinery]

### API Change

  - `create service externalname` ([#34789](https://github.com/kubernetes/kubernetes/pull/34789), [@adohe](https://github.com/adohe))
- `set selector` - update selector labels ([#38966](https://github.com/kubernetes/kubernetes/pull/38966), [@kargakis](https://github.com/kargakis))

  - kube-proxy addon starts to use the label `node.kubernetes.io/kube-proxy-ds-ready` instead of `beta.kubernetes.io/kube-proxy-ds-ready` as its node selector.
  - metadata-proxy addon starts to use the label `cloud.google.com/metadata-proxy-ready` instead of `beta.kubernetes.io/metadata-proxy-ready` as its node selector.

#### Storage