feat(cluster): card-based cluster type selector for K8s

Replace the GPU Service switch (with the small "cannot be used for
model service" caption) with a two-card radio selector that makes the
choice between Model Service and GPU Service explicit at a glance.

- Render two cards styled to match the existing SwitchCard (same
  border, radius, 12px/14px padding, and label/description typography)
  so the selector blends in with the surrounding form fields.
- Underlying form state is unchanged: picking GPU Service still seeds
  k8s_options.gpuInstanceOptions = {}, picking Model Service clears
  it — so the static-address field, the EDIT-mode change watcher, and
  the API payload all keep working as before.
- Align the GPU Service label with the top-level menu entry
  (menu.gpuService) — drop "Instance" / "实例" from the card title
  and the static access address label.

src/pages/cluster-management/components/cluster-form.tsx

@@ -26,7 +26,7 @@ import {
 import AdvanceConfig from '../step-forms/advance-config';
 import CloudProvider from './cloud-provider-form';
 import K8sAdvancedOptions, {
-  GpuInstanceServiceSwitch,
+  ClusterTypeSelector,
   K8sOptionsChangeWatcher
 } from './k8s-pod-spec';
 
@@ -260,8 +260,8 @@ const ClusterForm: React.FC<AddModalProps> = forwardRef(
           <Form.Item<FormData>
             name="description"
             rules={[{ required: false }]}
-            // For Kubernetes the GPU instance service switch follows directly,
-            // so fall back to the default item margin (matching the name field)
+            // For Kubernetes the cluster type selector follows directly, so
+            // fall back to the default item margin (matching the name field)
             // to keep the description spacing symmetric; other providers keep
             // the tighter gap before the advanced panel.
             style={{
@@ -275,9 +275,7 @@ const ClusterForm: React.FC<AddModalProps> = forwardRef(
             ></SealTextArea>
           </Form.Item>
 
-          {provider === ProviderValueMap.Kubernetes && (
-            <GpuInstanceServiceSwitch />
-          )}
+          {provider === ProviderValueMap.Kubernetes && <ClusterTypeSelector />}
 
           <CollapsePanel
             accordion={false}