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/__DEFINES/layers.dm

@@ -97,7 +97,6 @@
 #define SPACE_LAYER 1.8
 
 //#define TURF_LAYER 2 //For easy recordkeeping; this is a byond define. Most floors (FLOOR_PLANE) and walls (GAME_PLANE) use this.
-#define OPENSPACE_LAYER 600 //Openspace layer over all turfs
 
 // GAME_PLANE layers
 #define CULT_OVERLAY_LAYER 2.01
@@ -113,6 +112,9 @@
 #define DISPOSAL_PIPE_LAYER 2.3
 #define GAS_PIPE_HIDDEN_LAYER 2.35 //layer = initial(layer) + piping_layer / 1000 in atmospherics/update_icon() to determine order of pipe overlap
 #define WIRE_LAYER 2.4
+#define TRAM_XING_LAYER 2.41
+#define TRAM_RAIL_LAYER 2.42
+#define TRAM_FLOOR_LAYER 2.43
 #define WIRE_BRIDGE_LAYER 2.44
 #define WIRE_TERMINAL_LAYER 2.45
 #define GAS_SCRUBBER_LAYER 2.46

code/datums/elements/turf_transparency.dm

@@ -181,8 +181,6 @@ GLOBAL_LIST_EMPTY(pillars_by_z)
 
 	var/turf/our_turf = target
 
-	our_turf.layer = OPENSPACE_LAYER
-
 	RegisterSignal(target, COMSIG_TURF_MULTIZ_DEL, PROC_REF(on_multiz_turf_del))
 	RegisterSignal(target, COMSIG_TURF_MULTIZ_NEW, PROC_REF(on_multiz_turf_new))
 

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

code/game/turfs/open/floor/misc_floor.dm

@@ -110,6 +110,18 @@
 	floor_tile = /obj/item/stack/tile/noslip
 	slowdown = -0.3
 
+/turf/open/floor/noslip/tram_plate
+	name = "linear induction plate"
+	desc = "The linear induction plate that powers the tram."
+	icon_state = "tram_plate"
+	base_icon_state = "tram_plate"
+
+/turf/open/floor/noslip/tram_platform
+	name = "tram platform"
+	desc = "A sturdy looking tram platform."
+	icon_state = "tram_platform"
+	base_icon_state = "tram_platform"
+
 /turf/open/floor/noslip/setup_broken_states()
 	return list("noslip-damaged1","noslip-damaged2","noslip-damaged3")
 

code/modules/industrial_lift/industrial_lift.dm

@@ -780,6 +780,8 @@ GLOBAL_LIST_EMPTY(lifts)
 	desc = "A tram for tramversing the station."
 	icon = 'icons/turf/floors.dmi'
 	icon_state = "titanium_yellow"
+	layer = TRAM_FLOOR_LAYER
+	plane = GAME_PLANE
 	base_icon_state = null
 	smoothing_flags = NONE
 	smoothing_groups = null

code/modules/industrial_lift/tram_override_objects.dm

@@ -8,6 +8,7 @@
  * it will make the tram more expensive to move and we dont want that because we dont want to return to the days where
  * the tram took a third of the tick per movement when its just carrying its default mapped in objects
  */
+
 /obj/structure/grille/tram/Initialize(mapload)
 	. = ..()
 	RemoveElement(/datum/element/atmos_sensitive, mapload)
@@ -18,10 +19,15 @@
 	. = ..()
 	RemoveElement(/datum/element/atmos_sensitive, mapload)
 
-/obj/machinery/power/shuttle_engine/propulsion/tram
-	//if this has opacity, then every movement of the tram causes lighting updates
-	//DO NOT put something on the tram roundstart that has opacity, it WILL overload SSlighting
-	opacity = FALSE
+/turf/open/floor/glass/reinforced/tram/Initialize(mapload)
+	. = ..()
+	RemoveElement(/datum/element/atmos_sensitive, mapload)
+
+/turf/open/floor/glass/reinforced/tram
+	name = "tram bridge"
+	desc = "It shakes a bit when you step, but lets you cross between sides quickly!"
+	plane = GAME_PLANE
+	layer = TRAM_XING_LAYER
 
 /obj/machinery/door/window/tram
 	icon = 'icons/obj/doors/tramdoor.dmi'