Posters refactor (#24548)

* Posters refactor

- Posters now use a simple type-per-poster definition, rather than some
large global lists requiring sprite numbers to be the same as entries in
a list.
- Putting a specific poster on a map now simply means putting the
specific type that you want, rather than var editing (often
unsuccessfully).
- There are random all-posters, random contraband posters, and random
official posters for mappers too.
- Ripped posters are now their own type.
- The potential to make additional classes of posters has been left
open, I'd like to move a bunch of the advertisement posters to their own
catagory, and clean up the "official" category to be more obviously
on-brand.

* Updates DeltaStation

* Changed the maps of Metastation

* OmegaStation posters updated

* Updated Pubby posters

* Map merged?

* Updated away mission and ruin posters

* Removes vars from garbage

code/modules/cargo/packs.dm

@@ -1567,7 +1567,7 @@
 	contraband = TRUE
 	cost = 3000
 	num_contained = 6
-	contains = list(/obj/item/weapon/poster/contraband,
+	contains = list(/obj/item/weapon/poster/random_contraband,
 					/obj/item/weapon/storage/fancy/cigarettes/cigpack_shadyjims,
 					/obj/item/weapon/storage/fancy/cigarettes/cigpack_midori,
 					/obj/item/seeds/ambrosia/deus,