Merge branch '498999-vue3-migration-namespace_storage_app_spec' into 'master'

Fix Vue 3 failing test namespace_storage_app_spec

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/169038



Merged-by: Artur Fedorov <afedorov@gitlab.com>
Approved-by: Nataliia Radina <nradina@gitlab.com>
Approved-by: Lukas Eipert <leipert@gitlab.com>

ee/spec/frontend/usage_quotas/storage/components/namespace_storage_app_spec.js

 import { GlButton } from '@gitlab/ui';
 import VueApollo from 'vue-apollo';
 import Vue from 'vue';
-import { mountExtended } from 'helpers/vue_test_utils_helper';
+import { shallowMountExtended } from 'helpers/vue_test_utils_helper';
 import waitForPromises from 'helpers/wait_for_promises';
 import NamespaceStorageApp from '~/usage_quotas/storage/components/namespace_storage_app.vue';
 import ProjectList from '~/usage_quotas/storage/components/project_list.vue';
@@ -30,7 +30,7 @@ describe('NamespaceStorageApp', () => {
   const findProjectList = () => wrapper.findComponent(ProjectList);
   const createComponent = ({ provide = {} } = {}) => {
-    wrapper = mountExtended(NamespaceStorageApp, {
+    wrapper = shallowMountExtended(NamespaceStorageApp, {
       apolloProvider: createMockApollo([
         [getNamespaceStorageQuery, getNamespaceStorageHandler],
         [getProjectListStorageQuery, getProjectListStorageHandler],
@@ -39,6 +39,9 @@ describe('NamespaceStorageApp', () => {
         ...defaultNamespaceProvideValues,
         ...provide,
       },
+      stubs: {
+        StorageUsageStatistics,
+      },
     });
   };