Fix: convert Onnx DynamicSlice operator with 4 inputs to caffe2 fa… (#20846)
Summary:
I reported an issue [https://github.com/pytorch/pytorch/issues/20743](url)
and make this pull request for it
Pull Request resolved: https://github.com/pytorch/pytorch/pull/20846
Reviewed By: zrphercule
Differential Revision: D15569135
Pulled By: houseroad
fbshipit-source-id: 96a2c818ef666a7d79b96decfa347d7154b34d5c
