Named inference rule for `abs`. (#22151)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/22151
ghimport-source-id: 54c1726b578ac162af817f78df6f540b764e46e3
Test Plan:
- `python test/test_namedtensor.py` [namedtensor ci]
Imported from OSS
Differential Revision: D15970326
Pulled By: zou3519
fbshipit-source-id: 4ea25f0a73bbc24b604d3ded2027eeb4ce800de0
