Replaces all instances of /turf/simulated/shuttle with simulated/wall/shuttle or simulated/floor/shuttle counterparts. (#7315)

Replaced all the snowflakey shuttle turfs with either /turf/simulated/wall/shuttle or /turf/simulated/floor/shuttle where I could, meaning shuttles are no longer indestructible but they can still take a lot of punishment.
    Added a few unsimulated turf variants to use on the cc z-level rather than having to use their simulated counterparts.
    Added smooth dark shuttle wall icons and a few more shuttle floor variants by AmoryBlaine.
    Fixed the dark shuttle corner blocks from looking weird after transit.
    A side effect of removing these shuttle turf types, conjure spells will now work inside of shuttles that used these removed turfs. Could perhaps be readded using areas if needed.

This is part 1 of the stuff from #5771 which will be split up and added in smaller batches beginning with adding the turf types with this pr.

code/modules/materials/materials.dm

@@ -184,6 +184,8 @@ var/list/name_to_material
 		if ("vaurca")
 			wall_icon = 'icons/turf/smooth/vaurca_wall.dmi'
 			skip_blend = TRUE
+		if ("shuttle")
+			skip_blend = TRUE
 		else
 			world.log <<  "materials: [src] has unknown icon_base [icon_base]."
 
@@ -293,7 +295,7 @@ var/list/name_to_material
 	stack_type = /obj/item/stack/material/gold
 	icon_colour = "#EDD12F"
 	weight = 30
-	hardness = 15 
+	hardness = 15
 	conductivity = 41
 	stack_origin_tech = list(TECH_MATERIAL = 4)
 	sheet_singular_name = "ingot"
@@ -665,22 +667,17 @@ var/list/name_to_material
 	hitsound = 'sound/weapons/smash.ogg'
 
 // Adminspawn only, do not let anyone get this.
-/material/voxalloy
-	name = "voxalloy"
-	display_name = "durable alloy"
-	stack_type = null
-	icon_colour = "#6C7364"
-	integrity = 1200
-	melting_point = 6000       // Hull plating.
-	explosion_resistance = 200 // Hull plating.
-	hardness = 500
-	weight = 500
-	protectiveness = 80 // 80%
-
-/material/voxalloy/elevatorium
+/material/elevatorium
 	name = "elevatorium"
 	display_name = "elevator panelling"
+	stack_type = null
 	icon_colour = "#666666"
+	integrity = 1200
+	melting_point = 6000
+	explosion_resistance = 200
+	hardness = 500
+	weight = 500
+	protectiveness = 80
 
 /material/wood
 	name = "wood"
@@ -708,7 +705,7 @@ var/list/name_to_material
 
 /material/wood/log //This is gonna replace wood planks in a  way for NBT, leaving it here for now
 	name = "log"
-	stack_type = /obj/item/stack/material/woodlog 
+	stack_type = /obj/item/stack/material/woodlog
 	icon_colour = "#824B28"
 	integrity = 50
 	icon_base = "solid"
@@ -731,7 +728,7 @@ var/list/name_to_material
 	explosion_resistance = 0
 	hardness = 0.1
 	weight = 7
-	melting_point = T0C+220 
+	melting_point = T0C+220
 	ignition_point = T0C+218
 	sheet_singular_name = "branch"
 	sheet_plural_name = "branch"
@@ -1007,3 +1004,16 @@ var/list/name_to_material
 	weight = 23
 	protectiveness = 20 // 50%
 	conductivity = 10
+
+/material/shuttle
+	name = "shuttle"
+	display_name = "spaceship alloy"
+	stack_type = null
+	icon_colour = "#6C7364"
+	icon_base = "shuttle"
+	integrity = 1200
+	melting_point = 6000       // Hull plating.
+	explosion_resistance = 200 // Hull plating.
+	hardness = 500
+	weight = 500
+	protectiveness = 80 // 80%