[PyTorch] Add TI::add_owned_{in,out}put for clarity & use them (#58606)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58606
Removes the pit of non-success around using the owning variants; gives us the option to make add_{in,out}put borrow in the future as a pit of success if we decide that's not bc-breaking.
ghstack-source-id: 129882760
Test Plan: CI
Reviewed By: ngimel
Differential Revision: D28523976
fbshipit-source-id: ab5eb7bf5d672a0f8c4a50eb8a21c156d4189709
