Merge branch 'fix-for-ATR-22147' into 'master'

Fixed flags inconsistency when running on MC in runHLT_standaone

Closes ATR-22147

See merge request atlas/athena!37401

Trigger/TriggerCommon/TriggerJobOpts/share/runHLT_standalone.py

@@ -178,8 +178,9 @@ ConfigFlags.IOVDb.GlobalTag = globalflags.ConditionsTag()
 # Other defaults
 ConfigFlags.Beam.Type = jobproperties.Beam.beamType = 'collisions'
 jobproperties.Beam.bunchSpacing = 25
-globalflags.DatabaseInstance='CONDBR2' if opt.useCONDBR2 else 'COMP200'
-ConfigFlags.IOVDb.DatabaseInstance=globalflags.DatabaseInstance()
+if not ConfigFlags.Input.isMC:
+    globalflags.DatabaseInstance='CONDBR2' if opt.useCONDBR2 else 'COMP200'
+    ConfigFlags.IOVDb.DatabaseInstance=globalflags.DatabaseInstance()
 athenaCommonFlags.isOnline.set_Value_and_Lock(opt.isOnline)
 
 log.info('Configured the following global flags:')