[ONNX] Update slice process shape to support rank only inference (#65782) (#66149)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/66149
Updated logic will be able to infer rank of slice output, when only rank is known for slice input. Enables cases where `ConstantValueMap::HasRank(input)` is `True`, while `ConstantValueMap::HasShape(input)` is `False`.
Test Plan: Imported from OSS
Reviewed By: malfet
Differential Revision: D31423232
Pulled By: ezyang
fbshipit-source-id: 516e3916aa71afda2b10e44620636e42ed837236
Co-authored-by: BowenBao <bowbao@microsoft.com>
