[MIRROR] Fixes issue where role banned players can still play roles they're banned from. [MDB IGNORE] (#23399)

* Fixes issue where role banned players can still play roles they're banned from.

* Update sql_ban_system.dm

* Some formatting updates

---------

Co-authored-by: Timberpoes <silent_insomnia_pp@hotmail.co.uk>
Co-authored-by: Bloop <13398309+vinylspiders@users.noreply.github.com>

code/modules/unit_tests/emoting.dm

@@ -3,6 +3,7 @@
 
 /datum/unit_test/emoting/Run()
 	var/mob/living/carbon/human/human = allocate(/mob/living/carbon/human/consistent)
+	human.key = "EmoteTestKey"
 	RegisterSignal(human, COMSIG_MOB_EMOTE, PROC_REF(on_emote_used))
 
 	human.say("*shrug")
@@ -29,6 +30,8 @@
 	*/
 	//SKYRAT EDIT REMOVAL END
 
+	human.key = null
+
 /datum/unit_test/emoting/proc/on_emote_used()
 	SIGNAL_HANDLER
 	emotes_used += 1