test: migrate remaining public-api tests to Bazel (#22639)

We now create npm packages to cover all the public api assertions in tools/public_api_guard.
We no longer depend on ts-api-guardian from npm - it is now stale since the repository was archived.
There is no longer a gulp task to enforce or accept the public API, this is in CircleCI as part of running all bazel test targets.

PR Close #22639

packages/animations/browser/testing/rollup.config.js

@@ -12,6 +12,7 @@ const sourcemaps = require('rollup-plugin-sourcemaps');
 const globals = {
   '@angular/core': 'ng.core',
   '@angular/animations': 'ng.animations',
+  '@angular/animations/browser': 'ng.animations.browser',
   'rxjs/Observable': 'Rx',
   'rxjs/Subject': 'Rx',
 };