Turn more unmanaged global vars into GLOB (#20446)

Turned a ton of unmanaged globals into managed globals.
Refactored some UT output.
Removed some unused things, including vars.
Added a test to ensure people don't keep adding new unmanaged vars.

code/modules/world_api/commands/server_query.dm

@@ -16,7 +16,7 @@
 	s["roundduration"] = get_round_duration_formatted()
 	s["gameid"] = GLOB.round_id
 	s["game_state"] = SSticker ? SSticker.current_state : 0
-	s["transferring"] = evacuation_controller?.is_evacuating()
+	s["transferring"] = GLOB.evacuation_controller?.is_evacuating()
 
 	s["players"] = GLOB.clients.len
 	s["staff"] = GLOB.staff.len