Add TorchAOHfQuantizer (#32306)
* Add TorchAOHfQuantizer
Summary:
Enable loading torchao quantized model in huggingface.
Test Plan:
local test
Reviewers:
Subscribers:
Tasks:
Tags:
* Fix a few issues
* style
* Added tests and addressed some comments about dtype conversion
* fix torch_dtype warning message
* fix tests
* style
* TorchAOConfig -> TorchAoConfig
* enable offload + fix memory with multi-gpu
* update torchao version requirement to 0.4.0
* better comments
* add torch.compile to torchao README, add perf number link
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Co-authored-by: Marc Sun <marc@huggingface.co>
