Fix various runtimes (#48563)

The grille one could use a lower level solution eventually. As in 
separation of simple animal attack/visuals/aftereffects but that's 
bigger refactor.

* Fixes explosion dismemberment runtime.
* Fixes removing pen from PDA runtime.
* Mulebot bullet act runtime.
* Trying to refuel plasmacutter with fuel runtime.
* Fixes grille runtime.
* Teslium reaction runtime
* lavaland elite win runtime

code/modules/mob/living/simple_animal/bot/mulebot.dm

@@ -157,7 +157,7 @@
 
 /mob/living/simple_animal/bot/mulebot/bullet_act(obj/projectile/Proj)
 	. = ..()
-	if(.)
+	if(. && !QDELETED(src)) //Got hit and not blown up yet.
 		if(prob(50) && !isnull(load))
 			unload(0)
 		if(prob(25))

code/modules/mob/living/simple_animal/hostile/mining_mobs/elites/elite.dm

@@ -233,7 +233,8 @@ While using this makes the system rely on OnFire, it still gives options for tim
 	INVOKE_ASYNC(src, .proc/fighters_check)  //Checks to see if our fighters died.
 	INVOKE_ASYNC(src, .proc/arena_trap)  //Gets another arena trap queued up for when this one runs out.
 	INVOKE_ASYNC(src, .proc/border_check)  //Checks to see if our fighters got out of the arena somehow.
-	addtimer(CALLBACK(src, .proc/arena_checks), 50)
+	if(!QDELETED(src))
+		addtimer(CALLBACK(src, .proc/arena_checks), 50)
 
 /obj/structure/elite_tumor/proc/fighters_check()
 	if(activator != null && activator.stat == DEAD || activity == TUMOR_ACTIVE && QDELETED(activator))