Changes to drones and z-macros (#7068)

Turns the z-level restriction procs into macros
Changes z-level restrictions to use the macros
Use contact_levels for announcements (instead of player_levels)
Restricts the teleporter to station_levels instead of player_levels
Restricts AI tracking to station_levels instead of player_levels
Mechs only get tracking beacons if they are on station_levels (instead of player_levels)
Construction Drones gib if they enter a station level
Mining Drones gib if they leave the station levels
Removes the mining equipment vendor from the scrapheap

code/modules/admin/secrets/admin_secrets/prison_warp.dm

@@ -12,7 +12,7 @@
 	for(var/mob/living/carbon/human/H in mob_list)
 		var/turf/T = get_turf(H)
 		var/security = 0
-		if((T && T in current_map.admin_levels) || prisonwarped.Find(H))
+		if((T && isAdminLevel(T.z)) || prisonwarped.Find(H))
 		//don't warp them if they aren't ready or are already there
 			continue
 		H.Paralyse(5)

code/modules/admin/secrets/fun_secrets/ghost_mode.dm

@@ -30,7 +30,7 @@
 					step_rand(W)
 
 			var/area/A = get_area(M)
-			if(A.requires_power && !A.always_unpowered && A.power_light && (A.z in current_map.player_levels))
+			if(A.requires_power && !A.always_unpowered && A.power_light && isPlayerLevel(A.z))
 				affected_areas |= get_area(M)
 
 	affected_mobs |= user