Machinery Component Initialization Refactor (#3258)

Machinery objects' component_parts list is now automatically populated with the types in the component_types list. Types can have an associated number which is interpreted as an instruction to spawn that number of that type. This eliminates a few Initialize() procs, and simplifies others.
Example:

component_types = list(
    /obj/foo/bar,
    /obj/baz = 2
)
Other changes:

Cable coils will now no longer force a stack size of 30 when created without their stack size passed as a parameter - this fixes anonymous types not working correctly with cable coils.

code/modules/modular_computers/NTNet/NTNet_relay.dm

@@ -19,6 +19,11 @@
 	var/dos_capacity = 500		// Amount of DoS "packets" in buffer required to crash the relay
 	var/dos_dissipate = 1		// Amount of DoS "packets" dissipated over time.
 
+	component_types = list(
+		/obj/item/stack/cable_coil{amount = 15},
+		/obj/item/weapon/circuitboard/ntnet_relay
+	)
+
 // TODO: Implement more logic here. For now it's only a placeholder.
 /obj/machinery/ntnet_relay/operable()
 	if(!..(EMPED))
@@ -100,12 +105,10 @@
 		ntnet_global.add_log("Quantum relay manually [enabled ? "enabled" : "disabled"].")
 		update_icon()
 
-/obj/machinery/ntnet_relay/New()
+/obj/machinery/ntnet_relay/Initialize()
+	. = ..()
 	uid = gl_uid
 	gl_uid++
-	component_parts = list()
-	component_parts += new /obj/item/stack/cable_coil(src,15)
-	component_parts += new /obj/item/weapon/circuitboard/ntnet_relay(src)
 
 	update_icon()
 
@@ -113,7 +116,6 @@
 		ntnet_global.relays.Add(src)
 		NTNet = ntnet_global
 		ntnet_global.add_log("New quantum relay activated. Current amount of linked relays: [NTNet.relays.len]")
-	..()
 
 /obj/machinery/ntnet_relay/Destroy()
 	if(ntnet_global)