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/modules/admin/admin_verbs.dm

@@ -205,6 +205,7 @@ GLOBAL_LIST_INIT(admin_verbs_debug, list(
 	/client/proc/cmd_admin_delete,
 	/client/proc/cmd_debug_del_all,
 	/client/proc/air_report,
+	/client/proc/toggle_nonhorizon_temperature_graphics,
 	/client/proc/reload_admins,
 	/client/proc/print_random_map,
 	/client/proc/create_random_map,