Revert "build: switch example e2e tests to bazel (#28402)" (#28438)

This reverts commit ef78e33560.

PR Close #28438

tools/gulp-tasks/serve.js

@@ -23,4 +23,19 @@ 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()],
+    });
+  }
+
 };