jiterator reland (#75231)
Summary:
Reland of https://github.com/pytorch/pytorch/issues/74446
Pull Request resolved: https://github.com/pytorch/pytorch/pull/75231
Reviewed By: seemethere
Differential Revision: D35376250
Pulled By: ngimel
fbshipit-source-id: 486a575db6489d97cbefb2edc2206858a45ec470
(cherry picked from commit 4a0f379c4eef2395b11c4c0f16e5054ca25b8ade)
