Use global Vue instance in Jest (admin)

ee/spec/frontend/admin/subscriptions/show/components/app_spec.js

 import { GlButton } from '@gitlab/ui';
-import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
+import Vue from 'vue';
 import VueApollo from 'vue-apollo';
 import SubscriptionManagementApp from 'ee/admin/subscriptions/show/components/app.vue';
 import SubscriptionActivationCard from 'ee/admin/subscriptions/show/components/subscription_activation_card.vue';
@@ -19,8 +20,7 @@ import createMockApollo from 'helpers/mock_apollo_helper';
 import { extendedWrapper } from 'helpers/vue_test_utils_helper';
 import { license, subscriptionHistory } from '../mock_data';
 
-const localVue = createLocalVue();
-localVue.use(VueApollo);
+Vue.use(VueApollo);
 
 describe('SubscriptionManagementApp', () => {
   // March 16th, 2020
@@ -40,7 +40,7 @@ describe('SubscriptionManagementApp', () => {
   let currentSubscriptionResolver;
   let subscriptionHistoryResolver;
   const createMockApolloProvider = ([subscriptionResolver, historyResolver]) => {
-    localVue.use(VueApollo);
+    Vue.use(VueApollo);
     return createMockApollo([
       [subscriptionQueries.query, subscriptionResolver],
       [subscriptionHistoryQueries.query, historyResolver],
@@ -50,7 +50,6 @@ describe('SubscriptionManagementApp', () => {
   const createComponent = (props = {}, resolverMock) => {
     wrapper = extendedWrapper(
       shallowMount(SubscriptionManagementApp, {
-        localVue,
         apolloProvider: createMockApolloProvider(resolverMock),
         propsData: {
           licenseUsageFilePath: 'about:blank',

ee/spec/frontend/admin/subscriptions/show/components/subscription_activation_form_spec.js

 import { GlForm, GlFormCheckbox, GlFormInput, GlLink, GlSprintf } from '@gitlab/ui';
-import { createLocalVue, mount, shallowMount } from '@vue/test-utils';
+import { mount, shallowMount } from '@vue/test-utils';
+import Vue from 'vue';
 import VueApollo from 'vue-apollo';
 import SubscriptionActivationForm from 'ee/admin/subscriptions/show/components/subscription_activation_form.vue';
 import {
@@ -22,14 +23,12 @@ import {
   fakeActivationCode,
 } from '../mock_data';
 
-const localVue = createLocalVue();
-localVue.use(VueApollo);
+Vue.use(VueApollo);
 
 describe('SubscriptionActivationForm', () => {
   let wrapper;
 
   const createMockApolloProvider = (resolverMock) => {
-    localVue.use(VueApollo);
     return createMockApollo([[subscriptionQueries.mutation, resolverMock]]);
   };
 
@@ -55,7 +54,6 @@ describe('SubscriptionActivationForm', () => {
   } = {}) => {
     wrapper = extendedWrapper(
       mountMethod(SubscriptionActivationForm, {
-        localVue,
         apolloProvider: createMockApolloProvider(mutationMock),
         propsData: {
           ...props,

spec/frontend/admin/statistics_panel/components/app_spec.js

 import { GlLoadingIcon } from '@gitlab/ui';
-import { createLocalVue, shallowMount } from '@vue/test-utils';
+import { shallowMount } from '@vue/test-utils';
 import AxiosMockAdapter from 'axios-mock-adapter';
+import Vue from 'vue';
 import Vuex from 'vuex';
 import StatisticsPanelApp from '~/admin/statistics_panel/components/app.vue';
 import statisticsLabels from '~/admin/statistics_panel/constants';
@@ -9,8 +10,7 @@ import axios from '~/lib/utils/axios_utils';
 import { convertObjectPropsToCamelCase } from '~/lib/utils/common_utils';
 import mockStatistics from '../mock_data';
 
-const localVue = createLocalVue();
-localVue.use(Vuex);
+Vue.use(Vuex);
 
 describe('Admin statistics app', () => {
   let wrapper;
@@ -19,7 +19,6 @@ describe('Admin statistics app', () => {
 
   const createComponent = () => {
     wrapper = shallowMount(StatisticsPanelApp, {
-      localVue,
       store,
     });
   };

spec/frontend/admin/users/components/users_table_spec.js

 import { GlTable, GlSkeletonLoader } from '@gitlab/ui';
-import { createLocalVue } from '@vue/test-utils';
+import Vue from 'vue';
 import VueApollo from 'vue-apollo';
 
 import createMockApollo from 'helpers/mock_apollo_helper';
@@ -16,8 +16,7 @@ import { users, paths, createGroupCountResponse } from '../mock_data';
 
 jest.mock('~/flash');
 
-const localVue = createLocalVue();
-localVue.use(VueApollo);
+Vue.use(VueApollo);
 
 describe('AdminUsersTable component', () => {
   let wrapper;
@@ -48,7 +47,6 @@ describe('AdminUsersTable component', () => {
 
   const initComponent = (props = {}, resolverMock = fetchGroupCountsResponse) => {
     wrapper = mountExtended(AdminUsersTable, {
-      localVue,
       apolloProvider: createMockApolloProvider(resolverMock),
       propsData: {
         users,