Fixes machine using power from the area it was created in, rather than using the area it is in (#23188)

* Update machine area when power_change() is called.

* Do not attempt to unregister from null powernet

* Move to wrench and update wrench_acts

* Remove accidental pseudocode

---------

Co-authored-by: Adrer <adrermail@gmail.com>

code/modules/reagents/chemistry/machinery/chem_dispenser.dm

@@ -294,14 +294,7 @@
 
 /obj/machinery/chem_dispenser/wrench_act(mob/user, obj/item/I)
 	. = TRUE
-	if(!I.use_tool(src, user, 4 SECONDS, volume = I.tool_volume))
-		return
-	if(anchored)
-		anchored = FALSE
-		WRENCH_UNANCHOR_MESSAGE
-	else if(!anchored)
-		anchored = TRUE
-		WRENCH_ANCHOR_MESSAGE
+	default_unfasten_wrench(user, I, 4 SECONDS)
 
 /obj/machinery/chem_dispenser/attack_ai(mob/user)
 	return attack_hand(user)

code/modules/reagents/chemistry/machinery/chem_master.dm

@@ -148,9 +148,7 @@
 /obj/machinery/chem_master/wrench_act(mob/user, obj/item/I)
 	if(panel_open)
 		return
-	if(default_unfasten_wrench(user, I, time = 4 SECONDS))
-		power_change()
-		return TRUE
+	default_unfasten_wrench(user, I, 4 SECONDS)
 
 /obj/machinery/chem_master/ui_act(action, params, datum/tgui/ui, datum/ui_state/state)
 	if(..())