[FIX] website_payment: access parent payment method

On the other routes (e.g. /my/, /my/contract/) payment information on the parent
contact are displayed but can not be access in the my payment route.
You get in a unconsistant situation where you can access the contract of the
company and its payment information but can not use this payment information.

opw-681491, opw-681502

addons/website_payment/controllers/main.py

@@ -10,6 +10,7 @@ class website_payment(http.Controller):
         acquirers = list(request.env['payment.acquirer'].search([('website_published', '=', True), ('registration_view_template_id', '!=', False)]))
         partner = request.env.user.partner_id
         payment_methods = partner.payment_method_ids
+        payment_methods |= partner.commercial_partner_id.sudo().payment_method_ids
         values = {
             'pms': payment_methods,
             'acquirers': acquirers