Adds a new config option to disable ambience and white noise (#22064)

* finally... sweet sweet silence...

* well it works

* oops

code/controllers/subsystem/SSambience.dm

@@ -1,7 +1,7 @@
 /// The subsystem used to play ambience to users every now and then, makes them real excited.
 SUBSYSTEM_DEF(ambience)
 	name = "Ambience"
-	flags = SS_BACKGROUND | SS_NO_INIT
+	flags = SS_BACKGROUND
 	priority = FIRE_PRIORITY_AMBIENCE
 	runlevels = RUNLEVEL_GAME | RUNLEVEL_POSTGAME
 	wait = 1 SECONDS
@@ -9,6 +9,10 @@ SUBSYSTEM_DEF(ambience)
 	///Assoc list of listening client - next ambience time
 	var/list/ambience_listening_clients = list()
 
+/datum/controller/subsystem/ambience/Initialize()
+	if(GLOB.configuration.general.disable_ambient_noise)
+		flags |= SS_NO_FIRE
+
 /datum/controller/subsystem/ambience/fire(resumed)
 	for(var/C in ambience_listening_clients)
 		var/client/client_iterator = C