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

Event/xAOD/xAODMetaData/Root/FileMetaData_v1.cxx

@@ -21,7 +21,7 @@ namespace xAOD {
    { }
 
 
-   bool FileMetaData_v1::compareWith( const FileMetaData_v1& rhs, const std::set<std::string> ignore ) const
+   bool FileMetaData_v1::compareWith( const FileMetaData_v1& rhs, const std::set<std::string>& ignore ) const
    {
       // Get the variable types from both objects:
       SG::auxid_set_t auxids1 = this->getAuxIDs();