[ONNX] Fix for expand -1 dim value (#34069)
Summary:
PyTorch expand allows size with -1 dim value. -1 dim value means to infer the dimension from input tensor. This can be exported to ONNX expand with 1 dim value since ONNX expand supports two-way broadcast.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/34069
Reviewed By: hl475
Differential Revision: D20195532
Pulled By: houseroad
fbshipit-source-id: c90e7d51b9d7422c09c5ed6e135ca8263105b8c9
