E.g. because the default template has

PreemptType=preempt/partition_prio
PreemptMode=SUSPEND,GANG

you can't set turn this off using

openhpc_config:
  PreemptMode: 'OFF'

because that's a slurm error to have mode=off with type defined.

The community.general.ini_file module we use for the modifications actually can remove things with state: absent; I could have sworn it was possible to do something like setting the value to -absent- to trigger that, but it is not there!