build: switch example e2e tests to bazel (#28402)

* No longer builds the example e2e tests using "tsc". The examples are now built with Bazel and can therefore be built with Ivy by using the `--define=compile=aot` switch.
* No longer runs the example e2e tests using the protractor CLI. example e2e tests are executed with the Bazel protractor rule and can therefore run incrementally.

NOTE: Unit tests found within the examples are still running within the legacy jobs.

PR Close #28402

tools/gulp-tasks/serve.js

@@ -23,19 +23,4 @@ module.exports = {
     });
   },
 
-  // Serve the examples
-  examples: (gulp) => () => {
-    const connect = require('gulp-connect');
-    const cors = require('cors');
-    const path = require('path');
-
-    connect.server({
-      root: path.resolve(__dirname, '../../dist/examples'),
-      port: 8001,
-      livereload: false,
-      open: false,
-      middleware: (connect, opt) => [cors()],
-    });
-  }
-
 };