Refactor serialization copying to use source generators (#19412)

Content.Server/Shuttles/Components/GridFillComponent.cs

@@ -7,7 +7,7 @@ namespace Content.Server.Shuttles.Components;
 /// If added to an airlock will try to autofill a grid onto it on MapInit
 /// </summary>
 [RegisterComponent, Access(typeof(ShuttleSystem))]
-public sealed class GridFillComponent : Component
+public sealed partial class GridFillComponent : Component
 {
     [DataField("path")] public ResPath Path = new("/Maps/Shuttles/escape_pod_small.yml");
 }