Support multi-gpu CI for inductor-distributed (#87996)
This test by itself isn't the end goal, but it is a minimal test that exercises multi-gpu and the focus of the PR is the infra behind enabling that. I'll follow up with more tests using actual models etc.
and @malfet @desertfire for awareness/feedback on the infra side
Pull Request resolved: https://github.com/pytorch/pytorch/pull/87996
Approved by: https://github.com/aazzolini
