[pytorch][refactor] Explicitly use auto* for pointers (#32548)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/32548
As Title says.
ghstack-source-id: 97175523
Test Plan: CI
Differential Revision: D19541893
fbshipit-source-id: 96dce6964e6a89393d4159401a59672f041f51d3
