annotate torch._tensor_str (#48463)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/48462
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48463
Reviewed By: mrshenli
Differential Revision: D25187168
Pulled By: malfet
fbshipit-source-id: bb4ad1c6d376ad37995638615080452c71e36959
