Add bit for sMDT in TrkDriftCircleMath/MdtStationId.h; update code which uses MdtStationId

Add digit to indicate sMDT in TrkDriftCircleMath/MdtStationId.h to select correct tube radius. Avoids having to select sMDT chamber by Station Name which is layout dependent which code had been doing. Updated MuonSpectrometer/MuonReconstruction/MuonRecUtils/MuonStationIntersectSvc/src/MdtIntersectGeometry.cxx MuonSpectrometer/MuonReconstruction/MuonSegmentMakers/MuonSegmentMakerTools/DCMathSegmentMaker/src/DCMathSegmentMaker.cxx to use the new version of MdtStationId

Merge update will fix Jira ticket ATLASRECTS-3690: https://its.cern.ch/jira/browse/ATLASRECTS-3690

Code changes pass all RunTier0Tests.py tests.