fix antag selection being evil (#28197)

* fix antag selection being evil

* fix test

* untroll the other tests

* remove role timer troll

* Allow tests to modify antag preferences

* Fix antag selection

* Misc test fixes

* Add AntagPreferenceTest

* Fix lazy mistakes

* Test cleanup

* Try stop players in lobbies from being assigned mid-round antags

* ranting

* I am going insane

---------

Co-authored-by: deltanedas <@deltanedas:kde.org>
Co-authored-by: ElectroJr <leonsfriedrich@gmail.com>

Content.IntegrationTests/Tests/ResettingEntitySystemTests.cs

@@ -9,7 +9,6 @@ namespace Content.IntegrationTests.Tests
     [TestOf(typeof(RoundRestartCleanupEvent))]
     public sealed class ResettingEntitySystemTests
     {
-        [Reflect(false)]
         public sealed class TestRoundRestartCleanupEvent : EntitySystem
         {
             public bool HasBeenReset { get; set; }
@@ -49,8 +48,6 @@ namespace Content.IntegrationTests.Tests
 
                 system.HasBeenReset = false;
 
-                Assert.That(system.HasBeenReset, Is.False);
-
                 gameTicker.RestartRound();
 
                 Assert.That(system.HasBeenReset);