Core/Entities: Added possibility to inherit StringIds from other entities

Port From (https://github.com/TrinityCore/TrinityCore/commit/88bbd27f8d007dca17bb0d244fcf7e753506734e)

Source/Game/Entities/GameObject/GameObject.cs

@@ -2665,6 +2665,15 @@ namespace Game.Entities
             return GetGoInfo().ScriptId;
         }
 
+        public void InheritStringIds(GameObject parent)
+        {
+            // copy references to stringIds from template and spawn
+            m_stringIds = parent.m_stringIds;
+
+            // then copy script stringId, not just its reference
+            SetScriptStringId(parent.GetStringId(StringIdType.Script));
+        }
+
         public bool HasStringId(string id)
         {
             return m_stringIds.Contains(id);