[FIX] payment: Pay button always enabled with Term & Conditions

Steps to reproduce:

- Go to the website shop
- Add a product in the cart
- Add your address and click on checkout
- On the checkout, enable Terms & conditions

Bug:

The button was always enabled even if the check box with the terms & conditions were not
checked.

opw:2313437

closes odoo/odoo#55821

X-original-commit: 0415da51960819ec9c989e15a9229bd6d583ba1b
Signed-off-by: Simon Goffin (sig) <sig@openerp.com>

addons/payment/static/src/js/payment_form.js

@@ -22,7 +22,9 @@ publicWidget.registry.PaymentForm = publicWidget.Widget.extend({
      * @override
      */
     start: function () {
-        $("#o_payment_form_pay").removeAttr('disabled');
+        if(!$('#checkbox_cgv').length){
+            $("#o_payment_form_pay").removeAttr('disabled');
+        }
         var self = this;
         return this._super.apply(this, arguments).then(function () {
             self.options = _.extend(self.$el.data(), self.options);