[8102] Simplify code base at new root method WorldObject::CleanupsBeforeDelete

* Call it from Map::AddObjectToRemoveList and remove now not needed explcit calls
* Create Gameobject version to make GO with owner more safe for remove

src/game/Pet.cpp

@@ -680,7 +680,6 @@ void Pet::Remove(PetSaveMode mode, bool returnreagent)
             owner->SetPet(0);
     }
 
-    CleanupsBeforeDelete();
     AddObjectToRemoveList();
     m_removed = true;
 }