Improve Vineflower Error-Handling

[shartte]

If Vineflower runs out of memory, it'll skip a method and continue and ultimately return exit code 0, leading to an output.jar for which patching will fail (due to broken methods):

WARN:           Method <clinit> ()V in class net/minecraft/world/level/block/Blocks couldn't be decompiled.
java.lang.OutOfMemoryError: Java heap space
[...]
INFO:  ... done

We probably need to make our handling of Vineflower more robust. This is just a marker issue to remember to do that.
Switching to the Vineflower API may improve our ability to handle this, but has other significant cost associated with it.