Deduplicate calorimeter energy loss state updater in GlobalChi2Fitter

Previously, this bit of code was duplicated three times across the code, which is a code smell. @cbittric suggested this change in a code review for !35949 (merged). This commit deduplicates the code, converting all three instances to a call to a single new method.

Tracking/TrkFitter/TrkGlobalChi2Fitter/TrkGlobalChi2Fitter/GXFTrajectory.h

@@ -51,6 +51,8 @@ namespace Trk {
     void setChi2(double);
     void setMass(double);
 
+    void conditionalSetCalorimeterEnergyLossState(GXFTrackState *);
+
     std::pair<GXFTrackState *, GXFTrackState *> findFirstLastMeasurement(void);
     bool hasKink(void);