NOTE: This work is not yet fully complete; kernel is done, but
it was taking an exceedingly long time to get through libstratosphere.
Thus, I've temporarily added -Wno-error=unused-result for libstratosphere/stratosphere.
All warnings should be fixed to do the same thing Nintendo does as relevant, but this
is taking a phenomenally long time and is not actually the most important work to do,
so it can be put off for some time to prioritize other tasks for 21.0.0 support.
* result: try out some experimental shenanigans
* result: sketch out some more shenanigans
* result: see what it looks like to convert kernel to use result conds instead of guards
* make rest of kernel use experimental new macro-ing
