localizes create_all_lighting_objects (#85135)

## About The Pull Request

Moves create_all_lighting_objects to the only thing that uses it - the
lighting subsystem

I saw zero difference in lighting system init time

## Why It's Good For The Game

Reduces global proc pollution and keeps everything in the same place,
improving code readability

## Changelog
🆑
refactor: moves the create_all_lighting_objects proc to the lighting
subsystem
/🆑

code/controllers/subsystem/lighting.dm

@@ -26,6 +26,19 @@ SUBSYSTEM_DEF(lighting)
 
 	return SS_INIT_SUCCESS
 
+
+/datum/controller/subsystem/lighting/proc/create_all_lighting_objects()
+	for(var/area/area as anything in GLOB.areas)
+		if(!area.static_lighting)
+			continue
+		for (var/list/zlevel_turfs as anything in area.get_zlevel_turf_lists())
+			for(var/turf/area_turf as anything in zlevel_turfs)
+				if(area_turf.space_lit)
+					continue
+				new /datum/lighting_object(area_turf)
+			CHECK_TICK
+		CHECK_TICK
+
 /datum/controller/subsystem/lighting/fire(resumed, init_tick_checks)
 	MC_SPLIT_TICK_INIT(3)
 	if(!init_tick_checks)