[quant][graphmode][fx] Add support for batchnorm (#43334)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/43334
Porting op tests from test_quantize_jit.py
Test Plan:
TestQuantizeFxOps
Imported from OSS
Reviewed By: z-a-f
Differential Revision: D23243560
fbshipit-source-id: 0a7bc331293bbc3db85616bf43a995d3b112beb6
