fix(docs-infra): update app code to work with Ivy (#28530)

This commit also enables more tests to be run on CI with Ivy.

PR Close #28530

aio/tests/e2e/src/app.e2e-spec.ts

@@ -239,7 +239,9 @@ describe('site App', function() {
       /* tslint:disable:max-line-length */
       expect(page.ghLinks.get(0).getAttribute('href'))
         .toMatch(/https:\/\/github\.com\/angular\/angular\/edit\/master\/aio\/content\/guide\/http\.md\?message=docs%3A%20describe%20your%20change\.\.\./);
-    });
+    // TODO(gkalpak): This test often times out with Ivy (because loading `guide/http` takes a lot of time).
+    //                Remove the timeout once the performance issues have been fixed.
+    }, 60000);
 
     it('should not be present on top level pages', () => {
       page.navigateTo('features');