Metagame improvements to antag-before-job selection system (#35830)

* Initial commit

* Update the selection to only count for people who have one of the preferences assigned; latejoin on delay no longer applies pre-selection.

Content.Server/GameTicking/GameTicker.Spawning.cs

@@ -98,6 +98,9 @@ namespace Content.Server.GameTicking
                 if (job == null)
                 {
                     var playerSession = _playerManager.GetSessionById(netUser);
+                    var evNoJobs = new NoJobsAvailableSpawningEvent(playerSession); // Used by gamerules to wipe their antag slot, if they got one
+                    RaiseLocalEvent(evNoJobs);
+
                     _chatManager.DispatchServerMessage(playerSession, Loc.GetString("job-not-available-wait-in-lobby"));
                 }
                 else
@@ -209,6 +212,9 @@ namespace Content.Server.GameTicking
                     JoinAsObserver(player);
                 }
 
+                var evNoJobs = new NoJobsAvailableSpawningEvent(player); // Used by gamerules to wipe their antag slot, if they got one
+                RaiseLocalEvent(evNoJobs);
+
                 _chatManager.DispatchServerMessage(player,
                     Loc.GetString("game-ticker-player-no-jobs-available-when-joining"));
                 return;