Fixes layering of tram rails (#71382)

## About The Pull Request
-Fixes the layering of the tram rail so that it doesn't end up below the
reinforced glass.
-Replaces the last remaining vault platform turfs with proper tram
turfs.
-Removes an un-needed layer define for turf transparency.


![image](https://user-images.githubusercontent.com/83487515/204107725-c422180b-661c-4981-8a0b-edbdb7ced9fe.png)

## Why It's Good For The Game
The tram rail becoming disconnected when it travels over glass, in
reality that'd probably derail it. So let's fix it!
## Changelog
🆑 LT3
fix: Tram platform is now entirely built with tram tiles.
fix: All the parts of the tram are now on a correct layer/plane.
remove: Removed the openspace layer on the transparency plane.
/🆑

code/game/objects/structures/fluff.dm

@@ -273,8 +273,8 @@
 	desc = "Great for trams, not so great for skating."
 	icon = 'icons/obj/tram_rails.dmi'
 	icon_state = "rail"
-	layer = ABOVE_OPEN_TURF_LAYER
-	plane = FLOOR_PLANE
+	layer = TRAM_RAIL_LAYER
+	plane = GAME_PLANE
 	deconstructible = TRUE
 
 /obj/structure/fluff/tram_rail/floor