frontend-plugin-api: move new PluginWrapper to alpha

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

plugins/app/src/apis/PluginWrapperApi/DefaultPluginWrapperApi.tsx

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-import { PluginWrapperApi } from '@backstage/frontend-plugin-api';
+import { PluginWrapperApi } from '@backstage/frontend-plugin-api/alpha';
 import { ComponentType, ReactNode, useEffect, useState } from 'react';
 
 type WrapperInput = {

plugins/app/src/extensions/PluginWrapperApi.ts

@@ -16,9 +16,11 @@
 
 import {
   PluginWrapperBlueprint,
+  pluginWrapperApiRef,
+} from '@backstage/frontend-plugin-api/alpha';
+import {
   createExtensionInput,
   ApiBlueprint,
-  pluginWrapperApiRef,
 } from '@backstage/frontend-plugin-api';
 import { DefaultPluginWrapperApi } from '../apis/PluginWrapperApi';