Find a way to integrate fiber dumps with test frameworks

[djspiewak]

Probably related to #2580. It's usually much more useful to have fiber dumps during unit testing, but the current solution is baked into IOApp. We need to find a composable way of integrating this into the test runtimes such as munit or cats-effect-testing.

[armanbilge]

Yes. I constantly need this and end up re-writing tests as scala-cli apps.

[djspiewak]

Exactly. I still am not totally sure what form this can take but I want it quite badly