fixup! improve is_spawnable

Author: aalkin

Framework/Core/include/Framework/AnalysisHelpers.h

@@ -229,7 +229,7 @@ struct TableTransform {
 /// This helper struct allows you to declare extended tables which should be
 /// created by the task (as opposed to those pre-defined by data model)
 template <typename T>
-concept is_spawnable = soa::has_metadata<aod::MetadataTrait<T>> && soa::has_extension<typename aod::MetadataTrait<T>::metadata>;
+concept is_spawnable = soa::has_metadata<aod::MetadataTrait<o2::aod::Hash<T::ref.desc_hash>>> && soa::has_extension<typename aod::MetadataTrait<o2::aod::Hash<T::ref.desc_hash>>::metadata>;
 
 template <is_spawnable T>
 constexpr auto transformBase()