fix erroneous forward declaration of TableMetadata

Author: aalkin

Framework/Core/include/Framework/ASoA.h

@@ -232,7 +232,7 @@ struct TableMetadata {
 };
 
 template <typename T>
-concept is_metadata = framework::is_base_of_template_v<TableMetadata, T>;
+concept is_metadata = framework::base_of_template<TableMetadata, T>;
 
 template <typename D>
 struct MetadataTrait {
@@ -378,20 +378,14 @@ using SelectionVector = std::vector<int64_t>;
 template <typename T>
 concept has_parent_t = not_void<typename T::parent_t>;
 
-template <typename INHERIT>
-class TableMetadata;
-
-template <typename T>
-concept is_metadata = framework::base_of_template<TableMetadata, T>;
-
 template <typename T>
 concept is_metadata_trait = framework::specialization_of_template<aod::MetadataTrait, T>;
 
 template <typename T>
 concept has_metadata = is_metadata_trait<T> && not_void<typename T::metadata>;
 
 template <typename T>
-concept has_extension = is_metadata<T> && not_void<typename T::extension_table_t>;
+concept has_extension = aod::is_metadata<T> && not_void<typename T::extension_table_t>;
 
 template <typename T>
 concept is_spawnable_column = std::same_as<typename T::spawnable_t, std::true_type>;