Add ATLAS_CHECK_THREAD_SAFETY to LArG4FCAL and LArG4HEC packages

• Add ATLAS_CHECK_THREAD_SAFETY to LArG4FCAL package
• Add ATLAS_CHECK_THREAD_SAFETY to LArG4HEC package
  • https://twiki.cern.ch/twiki/bin/viewauth/AtlasComputing/CheckerGccPlugins
• Cast the return value of G4StepPoint::GetTouchable() to const G4TouchableHistory* rather than G4TouchableHistory* in HECGeometry.cc, LocalCalibrationCalculator.cc and LocalGeometry.cc