fix(packages): use ES modules for primary build (#11120)

modules/@angular/platform-server/testing/facade

@@ -0,0 +1 @@
+../../facade/src

modules/@angular/platform-server/testing/index.ts

@@ -0,0 +1,14 @@
+/**
+ * @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
+ */
+
+/**
+ * @module
+ * @description
+ * Entry point for all public APIs of the platform-browser-dynamic/testing package.
+ */
+export * from './server';

modules/@angular/platform-server/testing/private_import_platform_server.ts

@@ -0,0 +1,12 @@
+/**
+ * @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 {__platform_server_private__ as _} from '@angular/platform-server';
+
+export var INTERNAL_SERVER_PLATFORM_PROVIDERS: typeof _.INTERNAL_SERVER_PLATFORM_PROVIDERS =
+    _.INTERNAL_SERVER_PLATFORM_PROVIDERS;

modules/@angular/platform-server/testing/server.ts

@@ -7,11 +7,9 @@
  */
 
 import {platformCoreDynamicTesting} from '@angular/compiler/testing';
-import {ClassProvider, ExistingProvider, FactoryProvider, NgModule, PlatformRef, TypeProvider, ValueProvider, createPlatformFactory} from '@angular/core';
-
-import {BrowserDynamicTestingModule,} from '@angular/platform-browser-dynamic/testing';
-
-import {INTERNAL_SERVER_PLATFORM_PROVIDERS} from '../src/server';
+import {ClassProvider, ExistingProvider, FactoryProvider, NgModule, PlatformRef, Provider, TypeProvider, ValueProvider, createPlatformFactory} from '@angular/core';
+import {BrowserDynamicTestingModule} from '@angular/platform-browser-dynamic/testing';
+import {INTERNAL_SERVER_PLATFORM_PROVIDERS} from './private_import_platform_server';
 
 
 /**