Adds ST vs MT tests for forward detectors
Adds ST vs MT ART tests for ZDC, AFP, ALFA
will remove: --postExec 'from AthenaCommon.ConcurrencyFlags import jobproperties as jp;topSeq.G4AtlasAlg.Cardinality=jp.ConcurrencyFlags.NumThreads()' \
once !26916 (closed) is merged and G4AtlasAlg is reentrant.
Edited by Miha Muskinja