New Discord integration fixes (#37793)

Fix admin chat relay.

Fix leaked task instance.

Fix warning about gateway intents on startup.

Fix packaging.

Content.Packaging/ServerPackaging.cs

@@ -47,6 +47,7 @@ public static class ServerPackaging
         // Python script had Npgsql. though we want Npgsql.dll as well soooo
         "Npgsql",
         "Microsoft",
+        "Discord",
     };
 
     private static readonly List<string> ServerNotExtraAssemblies = new()