Draft: [trigEGam] Integration beteween mongroups and TrigEgammaMonitoring

This MR is to include mongroups inside the TrigEgammaMonitoring framework.

• A method was implemented in the TrigEgammaMonitCategoryMT reading, for now, the mongoups from JSON local file produced by a ART test.
• At this moment, only the primary chains was configured, and then, called inside the TrigEgammaMonitorConfigMT.py file .
• In a next MR, we will include a logic to route chains to shifter and expert folders automatically, according to their respective mongroups.

JIRA Ticket: ATR-25841 .

ping: @safarzad , @cjmeyer , @fernando , @kyjones and @jlieberm

LArCalorimeter/LArG4/LArG4Barrel/src/LArBarrelGeometry.h

 /*
-  Copyright (C) 2002-2017 CERN for the benefit of the ATLAS collaboration
+  Copyright (C) 2002-2022 CERN for the benefit of the ATLAS collaboration
 */
 
 // LArBarrelGeometry.hh
@@ -89,7 +89,7 @@ namespace LArG4 {
       // double m_yc[15];
       //double m_delta[15];   // zig-zag angles
       // to access G4 geometry
-      mutable LArCoudeElectrodes* m_coudeelec; // FIXME needed due to lazy initialization
+      const LArCoudeElectrodes* m_coudeelec;
       const LArCoudeAbsorbers* m_coudeabs;
       mutable LArStraightElectrodes* m_electrode; // FIXME needed due to lazy initialization
       mutable LArStraightAbsorbers* m_absorber; // FIXME needed due to lazy initialization