Unify quantized conv and linear tests (#26992)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26992
Run the same test for FBGEMM and QNNPACK backends.
Checks that QNNPACK or FBGEMM are supported before running it (using supported_qengines)
Test Plan:
python test/test_quantized.py TestQuantizedLinear
python test/test_quantized.py TestQuantizedConv
python test/test_quantized_models.py
python test/test_quantized_nn_mods.py
Imported from OSS
Differential Revision: D17689171
fbshipit-source-id: e11c0a5e41f5f4e6836a614a5b61e4db3c5e384b
