Allow game presets to disallow latejoining (#1816)

* Allow game presets to disallow latejoining

* Update Content.Server/GameTicking/GameTicker.cs

Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>

Co-authored-by: DrSmugleaf <DrSmugleaf@users.noreply.github.com>

Content.Server/GameTicking/GamePresets/PresetSuspicion.cs

@@ -30,6 +30,9 @@ namespace Content.Server.GameTicking.GamePresets
         public int MinPlayers { get; set; } = 5;
         public int MinTraitors { get; set; } = 2;
         public int PlayersPerTraitor { get; set; } = 5;
+
+        public override bool DisallowLateJoin => true;
+
         private static string TraitorID = "SuspicionTraitor";
         private static string InnocentID = "SuspicionInnocent";