Update ONNX constant folding to support opset 10. (#22515)
Summary:
Currently ONNX constant folding (`do_constant_folding=True` arg in `torch.onnx.export` API) supports only opset 9 of ONNX. For opset 10, it is a no-op. This change enables ONNX constant folding for opset 10. Specifically there are three main changes:
1) Turn on constant folding ONNX pass for opset 10.
2) Update support for opset 10 version of `onnx::Slice` op for backend computation during constant folding.
3) Enable constant folding tests in `test/onnx/test_utility_funs.py` for multiple opsets (9 and 10).
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22515
Reviewed By: zrphercule
Differential Revision: D16189336
Pulled By: houseroad
fbshipit-source-id: 3e2e748a06e4228b69a18c5458ca71491bd13875
