Gives the bank machine a makeover. (#57613)

This replaces the bank machine sprite from Goonstation with one using
/tg/'s regular terminal sprites.

Not only does it provide asset consistency with the rest of /tg/'s
terminals, it also means there's less Goon assets gumming up the
works.

In addition, it has directional sprites, meaning the bank machine
doesn't always have to be front facing anymore.

code/game/machinery/bank_machine.dm

@@ -1,7 +1,8 @@
 /obj/machinery/computer/bank_machine
 	name = "bank machine"
 	desc = "A machine used to deposit and withdraw station funds."
-	icon = 'goon/icons/obj/goon_terminals.dmi'
+	icon_screen = "vault"
+	icon_keyboard = "security_key"
 	idle_power_usage = 100
 
 	var/siphoning = FALSE