[quant][graph] Add quantized batch_norm2d support to graph mode (#36692)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/36692
Test Plan:
python test_quantize_script.py
Imported from OSS
Differential Revision: D21055596
fbshipit-source-id: b21ad6bb9763cd2e7b22f525a9a46e5f4d485e17
