fix antag selection being evil (#28197)

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

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