[FIX] point_of_sale : prevent error if you close/open POS

- create a new order
- add payment with payment terminal
- close POS
- Open POS
- Send the payment
When the payment succeed it raise. Because after a refresh this.payment_interface is undefined.

closes odoo/odoo#71326

Signed-off-by: pimodoo <pimodoo@users.noreply.github.com>

addons/point_of_sale/static/src/js/Screens/PaymentScreen/PaymentScreen.js

@@ -323,7 +323,7 @@ odoo.define('point_of_sale.PaymentScreen', function (require) {
             const isPaymentSuccessful = await payment_terminal.send_payment_request(line.cid);
             if (isPaymentSuccessful) {
                 line.set_payment_status('done');
-                line.can_be_reversed = this.payment_interface.supports_reversals;
+                line.can_be_reversed = payment_terminal.supports_reversals;
             } else {
                 line.set_payment_status('retry');
             }