Support stations with multiple z-levels (#35339)

* Remove ZLEVEL_STATION_PRIMARY

* Add Up and Down traits for use by ladders and chasms

* Give map_config creation its own proc

* Combine LoadConfig and ValidateJSON and remove transition_config

* Make space linkage a z-level trait

* Remove ZLEVEL_EMPTY_SPACE

* Update uses of GetFullMapPath

* Handle multi-Z stations and load Lavaland and Reebe at runtime

* Remove unused space maps

* Fix inappropriate z-expansion in map reader, improve logging

* Update comments relating to z-level configuration

* Add Lavaland and Reebe to ALL_MAPS

code/modules/mapping/reader.dm

@@ -94,7 +94,7 @@ GLOBAL_DATUM_INIT(_preloader, /dmm_suite/preloader, new)
 			var/zcrd = text2num(dmmRegex.group[5]) + z_offset - 1
 
 			var/zexpansion = zcrd > world.maxz
-			if(zexpansion)
+			if(zexpansion && !measureOnly)
 				if(cropMap)
 					continue
 				else