Implement unify_from_right (#22223)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22223
ghimport-source-id: b88bd2a13c1c9c699945a69ec05300c6e598e95a
Test Plan:
- `build/bin/NamedTensor_test` [namedtensor ci]
gh-metadata: pytorch pytorch 22223 gh/zou3519/62/head
Imported from OSS
Differential Revision: D16030551
Pulled By: zou3519
fbshipit-source-id: f3d53e3f9b2428a4926c61a02631e6cd29f89e4b
