Update to TorchFix 0.4.0 (#119424)
`torch.library.Library` updated to `torch.library._scoped_library` in files with many tests where it seems obvious to do, otherwise `noqa: TOR901` added - see https://github.com/pytorch/pytorch/pull/118318 for more context.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/119424
Approved by: https://github.com/zou3519
