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

Control/AthenaKernel/src/CondCont.cxx

@@ -1044,9 +1044,7 @@ CondContMixedBase::insertMixed (const EventIDRange& r,
   if (r.start().isTimeStamp() ) {
     start_key = keyFromTimestamp (r.start());
   }
-  else {
-    std::cout << "WLDEBUG: no TimeStamp in r.start(), assume inifinte range" << std::endl;
-  }
+
   key_type stop_key  = keyFromTimestamp (r.stop());
 
   StatusCode sc = StatusCode::SUCCESS;