Core/Spells: Implemented battle pet experience related spell effects and auras

Port From (https://github.com/TrinityCore/TrinityCore/commit/9354b4ac8ec63f0b2ee5ceb3c8b6a3c6a75bd99f)

Source/Game/DataStorage/Structs/GameTablesRecords.cs

@@ -49,6 +49,12 @@ namespace Game.DataStorage
         public float DemonHunter;
     }
 
+    public sealed class GtBattlePetXPRecord
+    {
+        public float Wins;
+        public float Xp;
+    }
+
     public sealed class GtCombatRatingsRecord
     {
         public float Amplify;