21.6 new workflow updates
requested to merge atlas-physics/pmg/mcexperts/powheg-experts/athena:21.6-NewWorkflowUpdates into 21.6
Moving all example joboptions to the new workflow format, with one directory for each process.
In addition: a clear print is made when a gridpack is used, which is usefull in the context of the new workflow - cf. this MR, and this ticket in the mcjoboptions repository (tagging @sargyrop).