Move interactable input handling into Player2D so we can selectively block it from working if OldComputer is open

We probably could have special-cased that check in Interactable now that I think about it

pharaoh.gd

@@ -1,7 +1,7 @@
 extends Interactable
 
 func _on_interacted() -> void:
-	#%OldComputer.open()
+	%OldComputer.open()
 
 	#Accomodate some collision antics.
 	var new_spawn_point = global_position + Vector2(0,-10)