[quant][onnx] Add support to convert max_pool2d quantized pytorch op to C2 (#33945)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/33945
Add mapping for this operator in symbolics
Test Plan:
python test/onnx/test_pytorch_onnx_caffe2_quantized.py TestQuantizedOps.test_max_pool2d
Imported from OSS
Differential Revision: D20433681
fbshipit-source-id: 88f02ade698262a6f8824671830bc1f7d40bbfa6
