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

This reverts commit ef78e33560.

PR Close #28438

packages/examples/core/testing/ts/BUILD.bazel

@@ -1,23 +0,0 @@
-load("//tools:defaults.bzl", "jasmine_node_test", "ts_library")
-
-ts_library(
-    name = "fake_async_lib",
-    srcs = [
-        "example_spec.ts",
-        "fake_async.ts",
-    ],
-    deps = [
-        "//packages/core/testing",
-        "@ngdeps//@types/jasmine",
-        "@ngdeps//@types/node",
-    ],
-)
-
-jasmine_node_test(
-    name = "test",
-    bootstrap = ["angular/tools/testing/init_node_spec.js"],
-    deps = [
-        ":fake_async_lib",
-        "//tools/testing:node",
-    ],
-)

packages/examples/core/testing/ts/example_spec.ts

@@ -1,12 +0,0 @@
-/**
- * @license
- * Copyright Google Inc. All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.io/license
- */
-
-// Import the "fake_async" example that registers tests which are shown as examples. These need
-// to be valid tests, so we run them here. Note that we need to add this layer of abstraction here
-// because the "jasmine_node_test" rule only picks up test files with the "_spec.ts" file suffix.
-import './fake_async';