Merge branch '21.0-restoreMissingMoments' into '21.0'

Restore CaloCluster moments ENG_FRAC_MAX and FIRST_ENG_DENS to xAOD

See merge request !2800

Former-commit-id: 23ed6118d10f88d4d926ac1bf6e004ce215db27b

Calorimeter/CaloExample/CaloRecEx/share/CaloRecOutputItemList_jobOptions.py

@@ -89,8 +89,8 @@ AODMoments=[#"LATERAL"
             ,"SECOND_LAMBDA"
             ,"CENTER_MAG"
             ,"CENTER_LAMBDA"
-            #,"FIRST_ENG_DENS"
-            #,"ENG_FRAC_MAX" 
+            ,"FIRST_ENG_DENS"
+            ,"ENG_FRAC_MAX" 
             ,"ISOLATION"
             ,"ENG_BAD_CELLS"
             ,"N_BAD_CELLS"