add type hints on recently added ops to make them scriptable (#35885)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/35885
For the ops I added recently, ensure all the typehints are
present, so that JIT can script them.
We might want to look into a test for this in the future.
Test Plan:
scripting works for all of them now:
https://gist.github.com/vkuzo/1d92fdea548ad596310fffcbe95e4438
Imported from OSS
Differential Revision: D20818431
fbshipit-source-id: 0de61eaf70c08d625128c6fffd05788e6e5bb920
