Strays away from GLOB.machines when possible (#71100)

## About The Pull Request

This replaces needless GLOB.machines with more precise lists whenever
one existed, plus adding a new one for CTF machines.

## Why It's Good For The Game

GLOB.machines holds every single /obj/machinery in the game, so checking
the whole list for stuff is pretty big. This aims to cut that down by
using smaller lists whenever possible. I also gave CTF a new list
because it checked machines very often.

## Changelog

Nothing player facing.

code/modules/mafia/controller.dm

@@ -412,7 +412,7 @@
  * * close: boolean, the state you want the curtains in.
  */
 /datum/mafia_controller/proc/toggle_night_curtains(close)
-	for(var/obj/machinery/door/poddoor/D in GLOB.machines) //I really dislike pathing of these
+	for(var/obj/machinery/door/poddoor/D in GLOB.airlocks) //I really dislike pathing of these
 		if(D.id != "mafia") //so as to not trigger shutters on station, lol
 			continue
 		if(close)