refactor: asset refs are specified via asset name not enum entry

src/ZoneCodeGeneratorLib/Domain/Information/MemberInformation.cpp

@@ -8,7 +8,6 @@ MemberInformation::MemberInformation(StructureInformation* parent, StructureInfo
       m_is_script_string(false),
       m_is_reusable(false),
       m_is_leaf(false),
-      m_fast_file_block(nullptr),
-      m_asset_ref(nullptr)
+      m_fast_file_block(nullptr)
 {
 }

src/ZoneCodeGeneratorLib/Domain/Information/MemberInformation.h

@@ -25,5 +25,5 @@ public:
     std::unique_ptr<IEvaluation> m_alloc_alignment;
     std::unique_ptr<CustomAction> m_post_load_action;
     const FastFileBlock* m_fast_file_block;
-    const EnumMember* m_asset_ref;
+    std::string m_asset_ref;
 };