[MDB IGNORE] UpdatePaths to convert directional pane windows to their proper subtypes, also creates the /south spawner for consistency (#74517)

## About The Pull Request
Title.

## Why It's Good For The Game
1. This nukes a lot of silly var edits, and cleans up maps
2. The south spawner *isn't* really needed, but having it is nice for
consistency and clarity
3. Sometime ago I forget which map but one of them had var edited
directional subtypes and that made me cry

## Changelog

🆑 Jolly
fix: Maps internally had the code for the "directional" windows altered
a bit. If you see stacked window panes or things look incorrectly,
please file a bug report as that isn't intentional!!
/🆑

code/modules/mining/equipment/survival_pod.dm

@@ -96,14 +96,7 @@
 	icon = 'icons/obj/lavaland/survival_pod.dmi'
 	icon_state = "pwindow"
 
-/obj/structure/window/reinforced/survival_pod/spawner/north
-	dir = NORTH
-
-/obj/structure/window/reinforced/survival_pod/spawner/east
-	dir = EAST
-
-/obj/structure/window/reinforced/survival_pod/spawner/west
-	dir = WEST
+MAPPING_DIRECTIONAL_HELPERS(/obj/structure/window/reinforced/survival_pod/spawner, 0)
 
 //Door
 /obj/machinery/door/airlock/survival_pod