feat(core): introduce ModuleWithProviders.

Modules can now provider helper functions that allow
to import a module together with an array of providers.

Part of #10043

modules/@angular/compiler-cli/integrationtest/src/module_fixtures.ts

@@ -7,7 +7,7 @@
  */
 
 import {LowerCasePipe, NgIf} from '@angular/common';
-import {ANALYZE_FOR_ENTRY_COMPONENTS, Component, ComponentFactoryResolver, Directive, Inject, Injectable, Input, NgModule, OpaqueToken, Pipe} from '@angular/core';
+import {ANALYZE_FOR_ENTRY_COMPONENTS, Component, ComponentFactoryResolver, Directive, Inject, Injectable, Input, ModuleWithProviders, NgModule, OpaqueToken, Pipe} from '@angular/core';
 import {BrowserModule} from '@angular/platform-browser';
 
 @Injectable()
@@ -60,11 +60,21 @@ export function provideValueWithEntryComponents(value: any) {
 
 @NgModule({
   declarations: [SomeDirectiveInLibModule, SomePipeInLibModule, CompUsingLibModuleDirectiveAndPipe],
+  exports: [CompUsingLibModuleDirectiveAndPipe],
   entryComponents: [CompUsingLibModuleDirectiveAndPipe],
-  providers: [
-    ServiceUsingLibModule,
-    provideValueWithEntryComponents([{a: 'b', component: CompUsingLibModuleDirectiveAndPipe}])
-  ],
 })
 export class SomeLibModule {
 }
+
+// TODO(tbosch): Make this a static method in `SomeLibModule` once
+// our static reflector supports it.
+// See https://github.com/angular/angular/issues/10266.
+export function someLibModuleWithProviders(): ModuleWithProviders {
+  return {
+    ngModule: SomeLibModule,
+    providers: [
+      ServiceUsingLibModule,
+      provideValueWithEntryComponents([{a: 'b', component: CompUsingLibModuleDirectiveAndPipe}])
+    ]
+  };
+}