Core/Spells: Pass cast item level to triggered spells

Port From (https://github.com/TrinityCore/TrinityCore/commit/8e2d1e328ebec60c76d65651b268ec3ad2ce26fc)

Source/Game/Entities/Object/WorldObject.cs

@@ -2323,6 +2323,9 @@ namespace Game.Entities
                 spell.SetSpellValue(pair.Key, pair.Value);
 
             spell.m_CastItem = args.CastItem;
+            if (args.OriginalCastItemLevel.HasValue)
+                spell.m_castItemLevel = args.OriginalCastItemLevel.Value;
+
             return spell.Prepare(targets.Targets, args.TriggeringAura);
         }