Refactor serialization copying to use source generators (#19412)

Content.Server/Nuke/NukeLabelComponent.cs

@@ -7,7 +7,7 @@ namespace Content.Server.Nuke;
 ///     This is a separate component because the fake nuclear bomb keg exists.
 /// </remarks>
 [RegisterComponent]
-public sealed class NukeLabelComponent : Component
+public sealed partial class NukeLabelComponent : Component
 {
     [DataField("prefix")] public string NukeLabel = "nuke-label-nanotrasen";
     [DataField("serialLength")] public int SerialLength = 6;