Removes persistence of items through changing species when not allowed to (#70008)

* Removes persistence of species-restricted items through changing

Makes use of item's mob_can_equip instead of mob's can_equip, making it take the item's restrictions into account.

Also, fixes the inventory's color, so it's properly red when you can't equip such an item, by making it also use mob_can_equip.

Finally, expands the species clothing unit test to take that into account, to prevent it breaking in the future.

code/datums/elements/strippable.dm

@@ -225,13 +225,7 @@
 	if (!ismob(source))
 		return FALSE
 
-	if (!equipping.mob_can_equip(
-		source,
-		user,
-		item_slot,
-		disable_warning = TRUE,
-		bypass_equip_delay_self = TRUE,
-	))
+	if (!equipping.mob_can_equip(source, item_slot, disable_warning = TRUE, bypass_equip_delay_self = TRUE))
 		to_chat(user, span_warning("\The [equipping] doesn't fit in that place!"))
 		return FALSE
 
@@ -248,13 +242,7 @@
 	if (!do_mob(user, source, get_equip_delay(equipping)))
 		return FALSE
 
-	if (!equipping.mob_can_equip(
-		source,
-		user,
-		item_slot,
-		disable_warning = TRUE,
-		bypass_equip_delay_self = TRUE,
-	))
+	if (!equipping.mob_can_equip(source, item_slot, disable_warning = TRUE, bypass_equip_delay_self = TRUE))
 		return FALSE
 
 	if (!user.temporarilyRemoveItemFromInventory(equipping))