[tensorexp] Add strides to Buf (#68018)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/68018
Test Plan: Imported from OSS
Reviewed By: zou3519
Differential Revision: D32262381
Pulled By: IvanKobzarev
fbshipit-source-id: dba79add0bf703bc2378d64e726d4c47ec30e3be
