Draft: Add End RICH2 state locations to Ttrack template

adding End RICH2 state location to Ttrack template for compatibility with MuonID algorithm

Event/TrackEvent/include/Event/Track_v3.h

@@ -99,7 +99,7 @@ namespace LHCb::Event::v3 {
 
   template <>
   struct available_states<TrackType::Ttrack> {
-    using type = state_collection<SL::FirstMeasurement, SL::LastMeasurement>;
+    using type = state_collection<SL::FirstMeasurement, SL::LastMeasurement, SL::EndRich2>;
   };
 
   template <>