test: update cli-hello-world-ivy to cli@7.2.0-rc.0 (#27797)

Updates the app itself to reflect the result of using the  `experimentalIvy` flag on the CLI.
The result is similar to:

    npx @angular/cli@next new cli-hello-world-ivy --experimental-ivy --defaults

But replaces the current (cli `7.2.0-rc.0`) `renderComponent` bootstrap with the usual `platformBrowserDynamic` one.
It also keeps what the app did (display a pipe, tests it).

PR Close #27797

integration/cli-hello-world-ivy/e2e/src/app.e2e-spec.ts

@@ -0,0 +1,19 @@
+import { AppPage } from './app.po';
+
+describe('cli-hello-world App', () => {
+  let page: AppPage;
+
+  beforeEach(() => {
+    page = new AppPage();
+  });
+
+  it('should display welcome message', () => {
+    page.navigateTo();
+    expect(page.getParagraphText()).toEqual('Welcome to cli-hello-world-ivy!');
+  });
+
+  it('the percent pipe should work', () => {
+    page.navigateTo();
+    expect(page.getPipeContent()).toEqual('100 % awesome');
+  })
+});

integration/cli-hello-world-ivy/e2e/src/app.po.ts

@@ -0,0 +1,15 @@
+import { browser, by, element } from 'protractor';
+
+export class AppPage {
+  navigateTo() {
+    return browser.get('/');
+  }
+
+  getParagraphText() {
+    return element(by.css('app-root h1')).getText();
+  }
+
+  getPipeContent() {
+    return element(by.css('app-root p')).getText();
+  }
+}