feat(ivy): strip all Angular decorators in compiled classes (#24677)

Previously ngtsc removed the class-level decorators (@Component,
etc) but left all the ancillary decorators (@Input, @Optional,
etc).

This changes the transform to descend into the members of decorated
classes and remove any Angular decorators, not just the class-level
ones.

PR Close #24677

packages/compiler-cli/src/ngtsc/program.ts

@@ -132,7 +132,7 @@ export class NgtscProgram implements api.Program {
       options: this.options,
       emitOnlyDtsFiles: false, writeFile,
       customTransformers: {
-        before: [ivyTransformFactory(compilation, coreImportsFrom)],
+        before: [ivyTransformFactory(compilation, reflector, coreImportsFrom)],
       },
     });
     return emitResult;