Do not run period tests for Actors Under Maintenance (opt-in?)

[metalwarrior665]

This is a bit tricky since we might want to run some tests (features that still work) and not others (features that don't work). @halvko had some use-case for this where they have long term Under maintenance

[halvko]

I think that if we are putting an actor under maintenance we are either working on making it work again and thus we will be running the tests in PRs or we have decided that it's not important enough that we care. I do think it makes sense to have the feature be opt-in though, whether that should be as part of the specific test setup or specific test assertion I'm not sure.