fix(@ngtools/webpack): remove internal markers

With these in, we can't access the properties from other Bazel targets.

Author: filipesilva

packages/ngtools/webpack/src/interfaces.ts

@@ -53,9 +53,7 @@ export interface AngularCompilerPluginOptions {
   logger?: logging.Logger;
   directTemplateLoading?: boolean;
 
-  /* @internal */
   emitClassMetadata?: boolean;
-  /* @internal */
   emitNgModuleScope?: boolean;
 
   /**