fix(vue): ootb unit testing should work with --routing #19921 (#23441)

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## Current Behavior
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When generating a vue application with routing and testing, the test
setup is incorrect and fails

## Expected Behavior
<!-- This is the behavior we should expect with the changes in this PR
-->
The test setup for vue applications with routing should work OOTB

## Related Issue(s)
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merged. -->

Fixes #19921

(cherry picked from commit 381e5cd)

packages/vue/src/generators/application/__snapshots__/application.spec.ts.snap

@@ -121,8 +121,9 @@ import { mount } from '@vue/test-utils';
 import App from './App.vue';
 
 describe('App', () => {
-  it('renders properly', () => {
+  it('renders properly', async () => {
     const wrapper = mount(App, {});
+
     expect(wrapper.text()).toContain('Welcome test 👋');
   });
 });

packages/vue/src/generators/application/files/common/src/app/App.spec.ts.template

@@ -1,12 +1,17 @@
 <% if ( unitTestRunner === 'vitest' ) { %>
 import { describe, it, expect } from 'vitest'
+<% } %><% if( routing ) { %>
+import router from '../router';
 <% } %>
 import { mount } from '@vue/test-utils'
 import App from './App.vue';
 
 describe('App', () => {
-  it('renders properly', () => {
-    const wrapper = mount(App, {})
+  it('renders properly', async () => {
+    const wrapper = mount(App, <% if( routing ) { %>{ global: { plugins: [router] }}<% } else { %>{}<% } %>)
+    <% if( routing ) { %>
+    await router.isReady();
+    <% } %>
     expect(wrapper.text()).toContain('Welcome <%= title %> 👋')
   })
 });

packages/vue/src/generators/application/files/routing/src/views/HomeView.vue.template

@@ -4,6 +4,6 @@ import NxWelcome from '../app/NxWelcome.vue'
 
 <template>
   <main>
-    <NxWelcome />
+    <NxWelcome title="<%= title %>" />
   </main>
 </template>