Move THC_sleep to ATen (#69038)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/69038
Test Plan: Imported from OSS
Reviewed By: anjali411
Differential Revision: D32872479
Pulled By: ngimel
fbshipit-source-id: 97c7592b16eee2ecc66c42507c358aa92cc8ee50
