[quant][fx] Validate qconfig_dict keys (#58566)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58566
Validates the keys of the qconfig_dict, prepare_custom_config_dict, convert_custom_config_dict, and
fuse_custom_config_dict. If the user passes in an invalid key or makes a type, we will throw and error and let the user know what keys are supported.
Test Plan:
Imported from OSS
python test/test_quantization.py
Reviewed By: jerryzh168
Differential Revision: D28540923
fbshipit-source-id: 5958c32017b7d16abd219aefc8e92c42543897c2
