* add a multi-gpu job for all example tests
* run only ported tests
* rename
* explain why env is re-activated on each step
* mark all unported/checked tests with @require_torch_non_multigpu_but_fix_me
* style
* Apply suggestions from code review
Co-authored-by: Sam Shleifer <sshleifer@gmail.com>
Co-authored-by: Sam Shleifer <sshleifer@gmail.com>