Core/Units: moved melee attack rage generation into Unit::AttackerStateUpdate and send the generated rage in combat log packet instead of power update packets

Port From (https://github.com/TrinityCore/TrinityCore/commit/aefcd2fac7bb8b1a29a3d346f79bf02d1d5efc4a)

Source/Game/Entities/Unit/Unit.Fields.cs

@@ -430,6 +430,7 @@ namespace Game.Entities
         public uint Blocked { get; set; }
         public HitInfo HitInfo { get; set; }
         public VictimState TargetState { get; set; }
+        public uint RageGained { get; set; }
 
         // Helper
         public WeaponAttackType AttackType { get; set; }