feat(@angular-devkit/build-angular): deprecate lazyModules option

String form of lazy loading and SystemJsNgModuleLoader are deprecated, and this is part of its usage.

See: https://angular.io/api/core/SystemJsNgModuleLoader#systemjsngmoduleloader

Author: Alan

packages/angular_devkit/build_angular/src/angular-cli-files/models/build-options.ts

@@ -69,6 +69,7 @@ export interface BuildOptions {
   scripts: ExtraEntryPoint[];
   styles: ExtraEntryPoint[];
   stylePreprocessorOptions?: { includePaths: string[] };
+  /** @deprecated SystemJsNgModuleLoader is deprecated, and this is part of its usage. */
   lazyModules: string[];
   platform?: 'browser' | 'server';
   fileReplacements: NormalizedFileReplacement[];

packages/angular_devkit/build_angular/src/browser/schema.json

@@ -312,6 +312,7 @@
       "items": {
         "type": "string"
       },
+      "x-deprecated": "'SystemJsNgModuleLoader' is deprecated, and this is part of its usage. Use 'import()' syntax instead.",
       "default": []
     },
     "budgets": {

packages/angular_devkit/build_angular/src/server/schema.json

@@ -217,6 +217,7 @@
       "items": {
         "type": "string"
       },
+      "x-deprecated": "'SystemJsNgModuleLoader' is deprecated, and this is part of its usage. Use 'import()' syntax instead.",
       "default": []
     },
     "watch": {