Update SSOverlays (ported from Baystation) (#19051)

Our SSOverlays system is outdated, and is likely the cause of many of
the issues seen in #18895. It has also been linked to a massive server
performance decrease.

This brings an updated system from Baystation, hopefully with speed
increases.

Should be testmerged, ideally with #18895.

---------

Co-authored-by: Cody Brittain <cbrittain10@live.com>

code/modules/games/cards.dm

@@ -294,14 +294,14 @@
 		name = "playing card"
 		desc = "A playing card."
 
-	cut_overlays()
+	ClearOverlays()
 
 	if(cards.len == 1)
 		var/datum/playingcard/P = cards[1]
 		var/image/I = new(src.icon, (concealed ? "[P.back_icon]" : "[P.card_icon]") )
 		I.pixel_x += (-5+rand(10))
 		I.pixel_y += (-5+rand(10))
-		add_overlay(I)
+		AddOverlays(I)
 		return
 
 	var/offset = FLOOR(20/cards.len, 1)
@@ -333,7 +333,7 @@
 			else
 				I.pixel_x = -7+(offset*i)
 		I.transform = M
-		add_overlay(I)
+		AddOverlays(I)
 		i++
 
 /obj/item/hand/dropped(mob/user)

code/modules/games/gamehelm.dm

@@ -48,15 +48,15 @@
 	var/muted = FALSE
 
 /obj/item/gamehelm/update_icon()
-	cut_overlays()
+	ClearOverlays()
 	if(open)
 		icon_state = "open_[case_color]"
-		add_overlay("buttons_open")
+		AddOverlays("buttons_open")
 	else
 		icon_state = "closed_[case_color]"
-		add_overlay("buttons_closed")
+		AddOverlays("buttons_closed")
 	if(current_screen_state)
-		add_overlay(current_screen_state)
+		AddOverlays(current_screen_state)
 
 /obj/item/gamehelm/process()
 	if(world.time < next_action_time)