test(ivy): add canonical template translation examples (#21374)

This change creates a spec file which contains canonical examples
of how the template compiler will translate templates into expected
output.

PR Close #21374

packages/core/src/render3/index.ts

@@ -84,3 +84,4 @@ export {
   defineDirective,
 };
 export {createComponentRef, detectChanges, getHostElement, markDirty, renderComponent};
+export {InjectFlags} from './di';