pytorch

cc489180 - [quant][graphmode][fx][refactor] Remove save_state and restore_state from Quantizer class (#59035)

[quant][graphmode][fx][refactor] Remove save_state and restore_state from Quantizer class (#59035) Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/59035 To remove Quantizer class and split prepare and convert functions to different files Test Plan: python test/test_quantization.py TestQuantizeFx python test/test_quantization.py TestQuantizeFxOps Imported from OSS Reviewed By: vkuzo Differential Revision: D28724872 fbshipit-source-id: d32752c635917c9820e5e7cc414ba9d48a258a19