[quant][fx] Allow incrementally remove the items in quantization_patterns.py (#74210)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/74210
This PR added a codepath for getting patterns (quantize handlers) for the backend_config_dict for native backend when
backend_config_dict is None. This would allow us to incrementally define the backend_config_dict for
pytorch native backend and gradually remove the entries in quantization_patterns.py
Test Plan:
python test/test_quantization.py TestQuantizeFx
python test/test_quantization.py TestQuantizeFxOps
Imported from OSS
Reviewed By: dzdang
Differential Revision: D34899783
fbshipit-source-id: 7f31292948d7fc4566e51e175b41511f52d0a880
(cherry picked from commit a9f6ebd6478f362d5bb9c5ae04e02369e00f550c)
