fix(ivy): NgOnChangesFeature no longer included in hello_world (#28187)

- Wraps the NgOnChangesFeature in a factory such that no side effects occur in the module root
- Adds comments to ngInherit property on feature definition interface to help guide others not to make the same mistake
- Updates compiler to generate the feature properly after the change to it being a factory
- Updates appropriate tests

PR Close #28187

tools/public_api_guard/common/common.d.ts

@@ -306,8 +306,8 @@ export declare class NgSwitchDefault {
 }
 
 export declare class NgTemplateOutlet implements OnChanges {
-    ngTemplateOutlet: TemplateRef<any>;
-    ngTemplateOutletContext: Object;
+    ngTemplateOutlet: TemplateRef<any> | null;
+    ngTemplateOutletContext: Object | null;
     constructor(_viewContainerRef: ViewContainerRef);
     ngOnChanges(changes: SimpleChanges): void;
 }