[MIRROR] Takes the Tram off of the game plane, to make everything on it look a lot less flat [MDB IGNORE] (#18122)

* Takes the Tram off of the game plane, to make everything on it look a lot less flat (#71858)

## About The Pull Request
That's about it. It being on the game plane sadly had the inherent issue
of "no more ambient occlusion for anything that goes in it", which made
it look jarring.

Sadly, because of this, I had to put regular iron floor tiles over the
pipes/wires/disposals pipes on those crossings, but that's just further
motivation for LT3 and I to work on some new glass plating and actual
glass tiles so we can make this work properly again.

## Why It's Good For The Game
Muh ambient occlusion.

Seriously, it just looks *SO* much better.

## Changelog

🆑 GoldenAlpharex
fix: Everything that goes on the tram should look a lot less flat now!
/🆑

* Takes the Tram off of the game plane, to make everything on it look a lot less flat

Co-authored-by: GoldenAlpharex <58045821+GoldenAlpharex@users.noreply.github.com>
Co-authored-by: Jolly-66 <70232195+Jolly-66@users.noreply.github.com>
Co-authored-by: GoldenAlpharex <jerego1234@hotmail.com>

code/game/objects/structures/fluff.dm

@@ -274,7 +274,7 @@
 	icon = 'icons/obj/tram_rails.dmi'
 	icon_state = "rail"
 	layer = TRAM_RAIL_LAYER
-	plane = GAME_PLANE
+	plane = FLOOR_PLANE
 	deconstructible = TRUE
 
 /obj/structure/fluff/tram_rail/floor

code/modules/industrial_lift/industrial_lift.dm

@@ -781,7 +781,6 @@ GLOBAL_LIST_EMPTY(lifts)
 	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

@@ -26,7 +26,6 @@
 /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