Fix cmake build for portable ops (#1562)

Summary:
Pull Request resolved: https://github.com/pytorch/executorch/pull/1562

When building quantized aot lib quantized ops build fails due to
- SizesType not using aliased namedspace
- Use of USE_ATEN_MODE vs USE_ATEN_LIB requires changing
  build/Utils.cmake

Also added quantized op lib cmake flow to CI
ghstack-source-id: 211657035
exported-using-ghexport

Reviewed By: larryliu0820

Differential Revision: D52626506

fbshipit-source-id: 900e840ad6458821d35a9a055079b4aebea75843