[PyTorch] Simple refcount bump fixes in standardizeVectorForUnion & callees (#66695)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/66695
More extra reference counting in this path.
ghstack-source-id: 145125484
Test Plan: CI
Reviewed By: suo
Differential Revision: D31692197
fbshipit-source-id: 126b6c72efbef9410d4c2e61179b6b67459afc23
