Draft: Allow setting verbosities for G4
Right now the verbosity settings for the G4 alg are a bit confusing (using a
str where it's most naturally an
int) and are actually just ignored in the algorithm itself. This MR should fix that. I've also tried to key the G4 verbosities to the verbosities of the algorithm/job but I'm less convinced that these are the correct values for that (G4 is very noisy when you do this).