Change onnxifi workflow to support multi-group quantized & Add multi quantization info to caffe2.proto (#20439)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20439
This is the QTensorProto workflow for multi group quantization in C2 side.
No DNNLOWP Tensor related thing is included in this pr, so once we finished glow side, we should be able to test this pr using resnet50.
Reviewed By: yinghai
Differential Revision: D15096919
fbshipit-source-id: 741eecd59eb79d24d9fe2b035f6246d42422d25c
