[quant][fx][graphmode][refactor] Remove qconfig_map from Quantizer (#58455)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/58455
Test Plan:
python test/test_quantization.py TestQuantizeFx
python test/test_quantization.py TestQuantizeFxOps
Imported from OSS
Reviewed By: vkuzo
Differential Revision: D28497967
fbshipit-source-id: 421ce3d86fadd3d92f4120b850b0167270509189
