A few hub improvements (#25980)
Summary:
This PR does a few small improvements to hub:
- add support `verbose` option in `torch.load`. Note that this mutes hitting cache message but keeps the message of first download as suggested. fixes https://github.com/pytorch/pytorch/issues/24791
- add support loading state dict from tar file or zip file in `torch.hub.load_state_dict_from_url`.
- add `torch.hub.download_url_to_file` as public API, and add BC bit for `_download_url_to_file`.
- makes hash check in filename optional through `check_hash`, many users don't have control over the naming, relaxing this constraint could potentially avoid duplicating download code on user end.
- move pytorch CI off `pytorch/vision` and use `ailzhang/torchhub_example` as a dedicated test repo. fixes https://github.com/pytorch/pytorch/issues/25865
Pull Request resolved: https://github.com/pytorch/pytorch/pull/25980
Differential Revision: D17495679
Pulled By: ailzhang
fbshipit-source-id: 695df3e803ad5f9ca33cfbcf62f1a4f8cde0dbbe
