Fix All Exoplanet Atmosphere Lag (#22924)

Y'know, probably. It certainly seems to work locally!

changes:
- code_imp: "Exoplanets now cache their main outdoor atmospheric region
instead of trying to search their entire map once per second."
- code_imp: "Exoplanet atmospheric calculations now run only when
necessary using new update_revision counter."
- code_imp: "Exoplanet atmospheres now wait until all random ruins have
been placed before trying to resolve the air everywhere."
- admin: "Adds new admin debug verb, 'Toggle Non-Horizon Temperature
Graphics', which toggles all off-ship gas temp graphics to address lag
in a pinch, if still necessary, without removing actual environmental
hazard."

code/ZAS/Turf.dm

@@ -6,7 +6,13 @@
 
 /turf/simulated/proc/update_graphic(list/graphic_add = null, list/graphic_remove = null)
 	if(graphic_add && LAZYLEN(graphic_add))
-		add_vis_contents(graphic_add)
+		if(SSair.suppress_nonhorizon_temperature_graphics && !is_station_level(z))
+			for(var/obj/gas_overlay/graphic in graphic_add)
+				if(graphic.gas_id == GAS_HEAT || graphic.gas_id == GAS_COLD)
+					continue
+				add_vis_contents(graphic)
+		else
+			add_vis_contents(graphic_add)
 	if(graphic_remove && LAZYLEN(graphic_remove))
 		remove_vis_contents(graphic_remove)