More incremental test discovery

[jekbradbury]

When I edit and save one test file, vscode (I'm using pytest) kicks off a project-wide test discovery (which takes 20+ seconds for my project). I'm not sure what set of things would need to change, but it would be nice if only the tests in that file needed to be rediscovered.

[karthiknadig]

Thank you for the suggestion! We have marked this issue as "needs decision" to make sure we have a conversation about your idea. We plan to leave this feature request open for at least a month to see how many 👍 votes the opening comment gets to help us make our decision.

[Conchylicultor]

I believe this is a duplicate of #4586

[karrtikr]

Thanks, closing as dup.