fix(@angular/build): include full metadata for AOT unit-testing

Include class metadata and JIT information in code built for development and/or test usage.
All non-optimized builds will now contain this metadata (`optimization.scripts` is false).
The Angular TestBed APIs require additional metadata for the Angular aspects of the application
such as Components, Modules, Pipes, etc.
TestBed may also leverage JIT capabilities during testing (e.g., overrideComponent).
To support all these TestBed usage scenarios both the underlying `setClassMetadata`
and `setNgModuleScope` class augmentation functions are now emitted when
test metadata inclusion is enabled.

(cherry picked from commit 578525e)

Author: clydin

packages/angular/build/src/tools/esbuild/angular/compiler-plugin.ts

@@ -35,6 +35,13 @@ export interface CompilerPluginOptions {
   sourcemap: boolean | 'external';
   tsconfig: string;
   jit?: boolean;
+
+  /**
+   * Include class metadata and JIT information in built code.
+   * The Angular TestBed APIs require additional metadata for the Angular aspects of the application
+   * such as Components, Modules, Pipes, etc.
+   * TestBed may also leverage JIT capabilities during testing (e.g., overrideComponent).
+   */
   includeTestMetadata?: boolean;
 
   advancedOptimizations?: boolean;
@@ -89,7 +96,7 @@ export function createCompilerPlugin(
           sourcemap: !!pluginOptions.sourcemap,
           thirdPartySourcemaps: pluginOptions.thirdPartySourcemaps,
           advancedOptimizations: pluginOptions.advancedOptimizations,
-          jit: pluginOptions.jit,
+          jit: pluginOptions.jit || pluginOptions.includeTestMetadata,
         },
         maxWorkers,
         cacheStore?.createCache('jstransformer'),
@@ -718,6 +725,7 @@ function createCompilerOptionsTransformer(
       externalRuntimeStyles: pluginOptions.externalRuntimeStyles,
       _enableHmr: !!pluginOptions.templateUpdates,
       supportTestBed: !!pluginOptions.includeTestMetadata,
+      supportJitMode: !!pluginOptions.includeTestMetadata,
     };
   };
 }