add out variant of linear (#61801)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/61801
resubmitting because the last one was unrecoverable due to making changes incorrectly in the stack
Test Plan: Imported from OSS
Reviewed By: desertfire
Differential Revision: D29812510
Pulled By: makslevental
fbshipit-source-id: ba9685dc81b6699724104d5ff3211db5852370a6
