Refactor serialization copying to use source generators (#19412)

Content.Shared/Construction/IGraphAction.cs

@@ -1,7 +1,7 @@
 namespace Content.Shared.Construction
 {
     [ImplicitDataDefinitionForInheritors]
-    public interface IGraphAction
+    public partial interface IGraphAction
     {
         // TODO pass in node/edge & graph ID for better error logs.
         void PerformAction(EntityUid uid, EntityUid? userUid, IEntityManager entityManager);