Refactor serialization copying to use source generators (#19412)

Content.Server/Ghost/Components/GhostComponent.cs

@@ -7,7 +7,7 @@ namespace Content.Server.Ghost.Components
 {
     [RegisterComponent]
     [ComponentReference(typeof(SharedGhostComponent))]
-    public sealed class GhostComponent : SharedGhostComponent
+    public sealed partial class GhostComponent : SharedGhostComponent
     {
         public TimeSpan TimeOfDeath { get; set; } = TimeSpan.Zero;
 
@@ -29,5 +29,5 @@ namespace Content.Server.Ghost.Components
         };
     }
 
-    public sealed class BooActionEvent : InstantActionEvent { }
+    public sealed partial class BooActionEvent : InstantActionEvent { }
 }