[quant][graphmode][fx][refactor] Remove node_name_to_scope from Quantizer (#59032)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/59032
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: D28724868
fbshipit-source-id: 6df639f20076b480812b6dcf0fc7d2c87ca29d8b
