Turns blood walking into an element (#64162)

Refactoring things to elements/components is better in general, and I thought this was a perfect thing to turn into one.

code/modules/mob/living/simple_animal/hostile/giant_spider.dm

@@ -673,10 +673,9 @@
 	web_speed = 0.7
 	menu_description = "Self-sufficient spider variant capable of healing themselves and producing webbbing fast, but has less health and damage. Toxin injection of 10u per bite."
 
-/mob/living/simple_animal/hostile/giant_spider/hunter/flesh/Moved(atom/oldloc, dir)
+/mob/living/simple_animal/hostile/giant_spider/hunter/flesh/Initialize(mapload)
 	. = ..()
-	if(prob(5))
-		new /obj/effect/decal/cleanable/blood/bubblegum(loc)
+	AddElement(/datum/element/blood_walk, /obj/effect/decal/cleanable/blood/bubblegum, blood_spawn_chance = 5)
 
 /mob/living/simple_animal/hostile/giant_spider/hunter/flesh/AttackingTarget()
 	if(is_busy)

code/modules/mob/living/simple_animal/hostile/megafauna/bubblegum.dm

@@ -99,6 +99,8 @@ Difficulty: Hard
 	hallucination_charge_surround.spawn_blood = TRUE
 	RegisterSignal(src, COMSIG_BLOOD_WARP, .proc/blood_enrage)
 	RegisterSignal(src, COMSIG_FINISHED_CHARGE, .proc/after_charge)
+	if(spawn_blood)
+		AddElement(/datum/element/blood_walk, /obj/effect/decal/cleanable/blood/bubblegum, 'sound/effects/meteorimpact.ogg', 200)
 
 /mob/living/simple_animal/hostile/megafauna/bubblegum/Destroy()
 	QDEL_NULL(triple_charge)
@@ -305,12 +307,6 @@ Difficulty: Hard
 	update_approach()
 	. = ..()
 
-/mob/living/simple_animal/hostile/megafauna/bubblegum/Moved(atom/OldLoc, Dir, Forced = FALSE)
-	. = ..()
-	if(spawn_blood)
-		new /obj/effect/decal/cleanable/blood/bubblegum(src.loc)
-	playsound(src, 'sound/effects/meteorimpact.ogg', 200, TRUE, 2, TRUE)
-
 /mob/living/simple_animal/hostile/megafauna/bubblegum/hallucination
 	name = "bubblegum's hallucination"
 	desc = "Is that really just a hallucination?"