feat(dev-infra): create environment stamping script in ng-dev (#36844)

Create a common environment stamping script in the ng-dev tooling
as to be used in common release tasks.  This is the first step in
consolidating pieces of the release scripting process into a single
location to develop a release tool.

PR Close #36844

dev-infra/release/cli.ts

@@ -0,0 +1,19 @@
+/**
+ * @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 * as yargs from 'yargs';
+import {buildEnvStamp} from './env-stamp';
+
+/** Build the parser for the release commands. */
+export function buildReleaseParser(localYargs: yargs.Argv) {
+  return localYargs.help().strict().demandCommand().command(
+      'build-env-stamp', 'Build the environment stamping information', {}, () => buildEnvStamp());
+}
+
+if (require.main === module) {
+  buildReleaseParser(yargs).parse();
+}