Detect out argument in the schema (#62755)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/62755
After this change, out argument can be checked by calling is_out()
Test Plan: Imported from OSS
Reviewed By: mruberry
Differential Revision: D30415256
Pulled By: tugsbayasgalan
fbshipit-source-id: b2e1fa46bab7c813aaede1f44149081ef2df566d
