[PyTorch] Add c10::hash<c10::ArrayRef<T>> (#64277)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/64277
Just moved the vector implementation to ArrayRef and re-implemented the former using the latter.
ghstack-source-id: 137978947
Test Plan: existing CI
Reviewed By: dhruvbird
Differential Revision: D30647666
fbshipit-source-id: c0f4f06c348d36882ec0db802be44d8c7749562f
