Slurm job generator allows to leave time field empty

This is part of

Timelimt-Feld soll alle dokumentierten Möglichkeiten akzeptieren (aktuell nur [dd-]hh:mm:ss)

Indeed, #SBATCH --time is rejected by Slurm.

assigned to @s6705566--tu-dresden.de

added Priority: Critical label

mentioned in commit b843618a

mentioned in merge request !668 (merged)

closed with commit b843618a

closed with merge request !668 (merged)

mentioned in commit 069877be