New review comment by ahesford on void-packages repository

https://github.com/void-linux/void-packages/pull/40569#discussion_r1025230818

Comment:
I think `python3 -m pytest` solved some issues at the time we added support for pytest in the build style. I'm not sure if it's still relevant. If the build style is changed, we should run through tests in at least a random sample of packages to have confidence that the change isn't causing more harm than good.

Keeping the module form in the pep517 style is probably the right behavior, because it's better to try running tests from the current directory than to fail when the pep517 builder leaves no stages package available for test.