test: verify auto-generated namespace and serviceAccount fields

- Added assertions for spec.namespace (should match name)
- Added assertions for spec.serviceAccount.name (should be name + '-service-account')
- Fully addresses test name promise to verify auto-generation
- Resolves CodeRabbit major finding #1 for ClusterExtensionForm

Addresses CodeRabbit review comment on PR openshift#16265

Author: cajieh

frontend/packages/operator-lifecycle-manager-v1/src/components/cluster-extension/__tests__/ClusterExtensionForm.spec.tsx

@@ -106,11 +106,17 @@ describe('ClusterExtensionForm', () => {
     await user.type(nameInput, 'my-operator');
 
     await waitFor(() => expect(nameInput).toHaveValue('my-operator'));
-    // Should call onChange with auto-generated names
+    // Should call onChange with auto-generated namespace and service account names
     await waitFor(() => {
       expect(mockOnChange).toHaveBeenLastCalledWith(
         expect.objectContaining({
           metadata: expect.objectContaining({ name: 'my-operator' }),
+          spec: expect.objectContaining({
+            namespace: 'my-operator',
+            serviceAccount: expect.objectContaining({
+              name: 'my-operator-service-account',
+            }),
+          }),
         }),
       );
     });