Revert "merge_rules, person_of_interst and CODEOWNERS now better aligned (#83127)"
This reverts commit fb833aabac9fde268cab4b0569ef068019ec3b51.
Reverted https://github.com/pytorch/pytorch/pull/83127 on behalf of https://github.com/malfet due to We should not have removed existing codeowners, nor spam Soumith and Ed with review requests
