[MIRROR] Refactors the procedural generation of lavaland and turf/closed/mineral (#2131)

* Refactor the procedural generation of lavaland and turf/closed/mineral (#54915)

This replaces lavaland's old diagonal tunnel gen which was really
horrendously jammed into asteroid floor code (?????) with Cellular
Automata which runs in rust (PR for that here:
https://github.com/tgstation/rust-g/pull/57 ). The new code is a bit
cleaner, but also looks better.

VID: https://streamable.com/a45ke2

Things to do:
- Make an icemoon version
- Fix the roundstart atmos adjacency issues

I asked AnturK if this was an acceptable PR for this month; he said it
was okay as long as I didn't add new areas, which I don't plan to do.
But if anyone thinks this PR breaks the spirit of the month I'll open
it again in december.

* Refactors the procedural generation of lavaland and turf/closed/mineral

Co-authored-by: Qustinnus <Floydje123@hotmail.com>

code/controllers/subsystem/mapping.dm

@@ -69,6 +69,8 @@ SUBSYSTEM_DEF(mapping)
 	repopulate_sorted_areas()
 	process_teleport_locs()			//Sets up the wizard teleport locations
 	preloadTemplates()
+	run_map_generation()
+
 #ifndef LOWMEMORYMODE
 	// Create space ruin levels
 	while (space_levels_so_far < config.space_ruin_levels)
@@ -306,6 +308,10 @@ GLOBAL_LIST_EMPTY(the_station_areas)
 	if(!GLOB.the_station_areas.len)
 		log_world("ERROR: Station areas list failed to generate!")
 
+/datum/controller/subsystem/mapping/proc/run_map_generation()
+	for(var/area/A in world)
+		A.RunGeneration()
+
 /datum/controller/subsystem/mapping/proc/maprotate()
 	if(map_voted || SSmapping.next_map_config) //If voted or set by other means.
 		return