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

This reverts commit ef78e33560.

PR Close #28438

packages/examples/test.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+set -u -e -o pipefail
+
+(
+  cd `dirname $0`
+  ./build.sh
+
+  gulp serve-examples &
+  trap "kill $!" EXIT
+
+  (
+    cd ../../
+    NODE_PATH=${NODE_PATH:-}:dist/all
+    $(npm bin)/protractor protractor-examples-e2e.conf.js --bundles=true
+  )
+)