See previous commit for partial rationale.
There's an argument to be made about the `NaN`-spreading semantics being
desirable because at least something will loudly fail in that case, but
I'm not so sure about that these days. It feels like either way if
`NaN`s are produced, then things are outside of any control, and chances
are the game can probably continue without crashing. And, this move
reduces our dependence on osuTK, which has already been living on
borrowed time for years now and is only awaiting someone brave to go
excise it.
Of note, I've disabled IPC on visual test runners as we generally don't
use IPC in these cases. Having it set means that the game will not open
while visual tests are open, which has been a complaint from devs in the
past.
Tests have started to output too much log content, causing viewing CI
failures to be painfully impossible. Roll back for now.
Fix may be related to
https://github.com/nunit/nunit3-vs-adapter/issues/941, although we don't
use filter.