Merge branch 'cherry-pick-c15b43b1-21.9' into '21.9'

Sweeping !31459 from 21.3 to 21.9.
Adding identification of stereo strips to MM helpers

See merge request !31518

MuonSpectrometer/MuonIdHelpers/MuonIdHelpers/MmIdHelper.h

@@ -93,7 +93,7 @@ class MmIdHelper : public MuonIdHelper {
   int gasGap(const Identifier& id) const;
   int multilayer(const Identifier& id) const;
   int channel(const Identifier& id) const;
-  bool measuresPhi(const Identifier& id) const; //Returns false
+  bool measuresPhi(const Identifier& id) const; //Returns true for stereo layers
 
   int numberOfMultilayers(const Identifier& id) const;
 
@@ -302,8 +302,12 @@ inline int MmIdHelper::gasGapMin() const {
   return GasGapMin;
 }
 /*******************************************************************************/ 
-inline bool MmIdHelper::measuresPhi(const Identifier& /*id*/) const{
-  return false; 
+inline bool MmIdHelper::measuresPhi(const Identifier& id) const{
+  bool measPhi = false;
+  int ml = multilayer(id);
+  int gg = gasGap(id);
+  if ( (ml==1 && gg>2) || (ml==2 && gg<3) ) measPhi = true;
+  return measPhi;                                                                                               
 }
 /*******************************************************************************/ 
 inline int MmIdHelper::gasGapMax() const {