[Tasks] Use dz switch id for task touch events (#2344)

This changes task touch elements to use the dz_switch_id as the goal id
instead of checking if a player zoned. It will remove the need to script
door clicks or modify task element zone field since task packet data can
just be imported.

zone/client.h

@@ -1178,6 +1178,10 @@ public:
 		}
 		else { return false; }
 	}
+	void UpdateTasksOnTouchSwitch(int dz_switch_id)
+	{
+		if (task_state) { task_state->UpdateTasksOnTouch(this, dz_switch_id); }
+	}
 	inline void TaskSetSelector(Mob *mob, int task_set_id)
 	{
 		if (task_manager) {