[quant][fx][bug] Fix error in convert step for QAT (#45050)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/45050
Update tests to actually test for QAT
Test Plan:
python test/test_quantization.py TestQuantizeFxOps.test_linear
Imported from OSS
Reviewed By: jerryzh168
Differential Revision: D23808022
fbshipit-source-id: d749ab2d215fe19238ff9d539307ffce9ef0ca9b
