build: add bazel integration test (#18733)

It includes sass compilation, and building the bazel package
distribution.

PR Close #18733

integration/bazel/src/app.module.ts

@@ -0,0 +1,9 @@
+import {HelloWorldModule} from './hello-world/hello-world.module';
+
+import {NgModule} from '@angular/core';
+import {BrowserModule} from '@angular/platform-browser';
+
+@NgModule({
+  imports: [BrowserModule, HelloWorldModule]
+})
+export class AppModule {}