feat(cluster): update K8s cluster form for new k8s_options API

Align the Kubernetes cluster create/edit page with the backend's
promotion of operator/K8s knobs out of worker_config and the removal
of gpuVendorOverrides.

- k8s_options: drop gpuVendorOverrides; add operatorImage, namespace,
  and gpuInstanceOptions (presence = GPU instances enabled, carrying an
  optional gpuInstancesAccessStaticAddress).
- Add a top-level system_default_container_registry to the cluster type
  (promoted out of worker_config on the backend).
- Group all k8s_options fields into a new top-level "K8s Deployment
  Options" collapsible section (sibling of Advanced, rendered above it),
  with namespace first followed by volume mounts, image credentials,
  node selector, operator image, and GPU instances.
- Drive the GPU instances toggle from local state instead of
  Form.useWatch (an unregistered nested path never re-rendered, leaving
  the switch unresponsive); use antd's borderless Switch and keep the
  label/switch grouped together. Namespace gains a gpustack-system
  placeholder.
- Remove the gpuVendorOverrides validation from the form and the stale
  operator_image / namespace / gpu_instances_access_static_address hints
  from the worker_config YAML template and JSON schema.
- Add-worker GPU picker: always allow multi-select for K8s clusters
  (runtime node selectors are now auto-derived), dropping the
  override-gating, cluster fetch, and single-only hint.
- Update locales (en/zh/ja/ru/tr) for the removed and added keys.

src/pages/cluster-management/step-forms/advance-config.tsx

@@ -7,8 +7,6 @@ import { useIntl } from '@umijs/max';
 import { Button, Form } from 'antd';
 import React, { forwardRef, useEffect, useImperativeHandle } from 'react';
 import styled from 'styled-components';
-import K8sPodSpec from '../components/k8s-pod-spec';
-import K8SVolumeMount from '../components/k8s-volume-mount';
 import { ProviderType, ProviderValueMap } from '../config';
 import {
   ClusterFormData as FormData,
@@ -90,14 +88,6 @@ const ClusterAdvanceConfig: React.FC<{
       >
         <CInput.TextArea required={false} trim={false}></CInput.TextArea>
       </Form.Item>
-      {provider === ProviderValueMap.Kubernetes && (
-        <>
-          <K8SVolumeMount action={action}></K8SVolumeMount>
-          <K8sPodSpec
-            initialOverrides={currentData?.k8s_options?.gpuVendorOverrides}
-          ></K8sPodSpec>
-        </>
-      )}
       <Title>
         {intl.formatMessage({ id: 'clusters.create.workerConfig' })}
       </Title>