Emulate weight and activation only quant with fake quant, numerics test (#26625)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26625
ghstack-source-id: 91008296
Test Plan: buck test caffe2/test:quantized -- 'test_weight_only_activation_only_fakequant \(test_quantized_models\.ModelNumerics\)' --print-passing-details
Differential Revision: D17520342
fbshipit-source-id: 26e148d3299afcfdfb1187aff6ab80687ed8df47
