feat(ivy): @NgModule -> ngInjectorDef compilation (#22458)

This adds compilation of @NgModule providers and imports into
ngInjectorDef statements in generated code. All @NgModule annotations
will be compiled and the @NgModule decorators removed from the
resultant js output.

All @Injectables will also be compiled in Ivy mode, and the decorator
removed.

PR Close #22458

packages/compiler/src/output/map_util.ts

@@ -0,0 +1,29 @@
+/**
+ * @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 o from './output_ast';
+
+export type MapEntry = {
+  key: string,
+  quoted: boolean,
+  value: o.Expression
+};
+
+export type MapLiteral = MapEntry[];
+
+export function mapEntry(key: string, value: o.Expression): MapEntry {
+  return {key, value, quoted: false};
+}
+
+export function mapLiteral(obj: {[key: string]: o.Expression}): o.Expression {
+  return o.literalMap(Object.keys(obj).map(key => ({
+                                             key,
+                                             quoted: false,
+                                             value: obj[key],
+                                           })));
+}