UInstancedActorsComponent::SerializeInstancePersistenceData

Called by [AInstancedActorsManager::SerializeInstancePersistenceData](API\Plugins\InstancedActors\AInstancedActorsManager\SerializeInstanc-) for IAD's with an ActorClass containing this [UInstancedActorsComponent](API\Plugins\InstancedActors\UInstancedActorsComponent), to save / load extended persistence data.