Adds a Debug command to stop all weather. (#80848)

Atomizing out of #78524 as a result of that PR being too big and this
was quite easy to do.

## About The Pull Request

This adds a debug (admin) command that allows you to stop all weather
effects that are going on across the map in a given instance. This is
useful for when you are testing something on lavaland and need the storm
to stop, or if you otherwise had some other kind of weather effect
interfering with testing something. It's worth noting this directly
calls end() on the active weather effect, meaning that for more
complicated weather that may have different side effects, it may need
some extra finess, but as of current writing no weather does anything
interesting in their wind_down() procs.

## Why It's Good For The Game

God weather is so annoying while testing lavaland, plus this is just
straight admin and testing tooling so there's no harm.

## Changelog

🆑
admin: Added a new admin verb that ends all active weather within the
weather subsystem.
/🆑

code/controllers/subsystem/weather.dm

@@ -85,3 +85,17 @@ SUBSYSTEM_DEF(weather)
 ///Returns an active storm by its type
 /datum/controller/subsystem/weather/proc/get_weather_by_type(type)
 	return locate(type) in processing
+
+/**
+ * Calls end() on all current weather effects that are currently processing in the weather subsystem.
+ */
+/client/proc/stop_weather()
+	set category = "Debug"
+	set name = "Stop All Active Weather"
+
+	log_admin("[key_name(src)] stopped all currently active weather.")
+	message_admins("[key_name_admin(src)] stopped all currently active weather.")
+	for(var/datum/weather/current_weather as anything in SSweather.processing)
+		if(current_weather in SSweather.processing)
+			current_weather.end()
+	BLACKBOX_LOG_ADMIN_VERB("Stop All Active Weather")

code/modules/admin/admin_verbs.dm

@@ -233,6 +233,7 @@ GLOBAL_PROTECT(admin_verbs_debug)
 	/client/proc/validate_puzzgrids,
 	/client/proc/GeneratePipeSpritesheet,
 	/client/proc/view_runtimes,
+	/client/proc/stop_weather,
 	)
 GLOBAL_LIST_INIT(admin_verbs_possess, list(/proc/possess, /proc/release))
 GLOBAL_PROTECT(admin_verbs_possess)