Makes test_indexing.py device generic (#26634)
Summary:
- Makes test_indexing.py device generic
- Removes test_indexing_cuda.py
Note: a couple tests in test_indexing.py were already CPU and CUDA tests, meaning these tests were run multiple times when CUDA was available. Genericizing test_indexing.py corrects this and lets these tests be run on other device types, like XLA, too.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/26634
Differential Revision: D17529001
Pulled By: mruberry
fbshipit-source-id: e71ba28d947749255a0aceeb7b77a42c4811439d
