ns for fx: support comparing fp32 vs fp32_prepared, except shadowed (#61129)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61129
Adds support the comparing fp32 model (without quantization) to a
fp32 model prepared with quantization. The main missing feature was
handling conv-bn fusion, since this fusion for PTQ happens outside
of quantization patterns.
Adds testing for this case for comparing weights and comparing
activations
Adds a TODO for also handling this for shadow activations, we need to
first stop removing observers in graph passes before we can add
this support, will be in a future PR.
Test Plan:
```
python test/test_quantization.py TestFXGraphMatcherModels.test_mobilenet_v2
python test/test_quantization.py TestFXGraphMatcherModels.test_mobilenet_v2_qat
python test/test_quantization.py TestFXNumericSuiteCoreAPIsModels.test_compare_activations_conv
```
Imported from OSS
Reviewed By: raghuramank100
Differential Revision: D29520009
fbshipit-source-id: f63484a998f1424bd9cacf5d823b82b2edfea1ae
