Support empty steps in newJO menu CF/DF building - enable more muon steps

Trigger/TrigSteer/DecisionHandling/CMakeLists.txt

...igSteer/DecisionHandling/python/DecisionHandlingConfig.py

Trigger/TrigSteer/DecisionHandling/src/PassFilter.cxx

Trigger/TrigSteer/DecisionHandling/src/PassFilter.h

Trigger/TrigSteer/DecisionHandling/src/RoRSeqFilter.cxx

Trigger/TrigSteer/DecisionHandling/src/RoRSeqFilter.h

...isionHandling/src/components/DecisionHandling_entries.cxx

Trigger/TriggerCommon/TriggerJobOpts/python/TriggerConfig.py

...rMenuMT/python/HLTMenuConfig/Electron/generateElectron.py

...mon/TriggerMenuMT/python/HLTMenuConfig/Jet/generateJet.py

...ggerMenuMT/python/HLTMenuConfig/Menu/HLTCFConfig_newJO.py

...on/TriggerMenuMT/python/HLTMenuConfig/Menu/HLTMenuJSON.py

...n/TriggerMenuMT/python/HLTMenuConfig/Menu/LS2_v1_newJO.py

...TriggerMenuMT/python/HLTMenuConfig/Menu/MenuComponents.py

...iggerMenuMT/python/HLTMenuConfig/Menu/TriggerConfigHLT.py

...n/TriggerMenuMT/python/HLTMenuConfig/Muon/generateMuon.py