[LT] Sync LTC branch changes on torch/csrc/lazy/core (#69012)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/69012
Some changes to torch/csrc/lazy/core were done on the
lazy_tensor_staging branch (https://github.com/pytorch/pytorch/pull/68427).
Merge those back into the trunk.
Test Plan: Imported from OSS
Reviewed By: wconstab
Differential Revision: D32708696
Pulled By: desertfire
fbshipit-source-id: e54b978f2bdb9c7db27880f60246fdf1e8b41019
