Use `C10_API_ENUM` to fix invalid attribute warnings (#42464)
Summary:
Using the macro added in https://github.com/pytorch/pytorch/issues/38988 to fix more attribute warnings.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/42464
Reviewed By: malfet
Differential Revision: D22916943
Pulled By: ezyang
fbshipit-source-id: ab9ca8755cd8b89aaf7f8718b4107b4b94d95005
