[FIX] website_sale: prevent issue with test shop_list_view_b2c

It very rarely happens that the test is failing due to the following error:

`Tour shop_list_view_b2c failed at step
.oe_product_cart .oe_currency_value:contains("825.00")`

The value found in that case is 750 instead of 825, which indicates that the b2c
setting was not correctly activated.

To exclude the RPC themselves from the equation, it is decided here to move the
setting change directly in the Python.

closes odoo/odoo#44528

X-original-commit: 3edc88911bf24cd57a27933cf3ffb03a42168bc9
Signed-off-by: Sébastien Theys (seb) <seb@odoo.com>

addons/website_sale/static/tests/tours/website_sale_shop_list_view_b2c.js

 odoo.define('website_sale.tour_shop_list_view_b2c', function (require) {
 'use strict';
 
-var rpc = require('web.rpc');
 var tour = require('web_tour.tour');
 
 tour.register('shop_list_view_b2c', {
@@ -9,30 +8,6 @@ tour.register('shop_list_view_b2c', {
     url: '/shop?search=Test Product',
 },
     [
-        {
-            content: "activate b2c",
-            trigger: 'body',
-            run: function () {
-                return rpc.query({
-                    model: 'res.config.settings',
-                    method: 'create',
-                    args: [{
-                        'auth_signup_uninvited': 'b2c',
-                        'show_line_subtotals_tax_selection': 'tax_included',
-                        'group_show_line_subtotals_tax_excluded': false,
-                        'group_show_line_subtotals_tax_included': true,
-                    }],
-                }).then(function (resId) {
-                    return rpc.query({
-                        model: 'res.config.settings',
-                        method: 'execute',
-                        args: [[resId]],
-                    }).then(function () {
-                        window.location.reload();
-                    });
-                });
-            },
-        },
         {
             content: "check price on /shop",
             trigger: '.oe_product_cart .oe_currency_value:contains("825.00")',

addons/website_sale/tests/test_customize.py

@@ -208,4 +208,10 @@ class TestUi(odoo.tests.HttpCase):
         self.start_tour("/", 'tour_shop_no_variant_attribute', login="demo")
 
     def test_06_admin_list_view_b2c(self):
+        # activate b2c
+        config = self.env['res.config.settings'].create({})
+        config.show_line_subtotals_tax_selection = "tax_included"
+        config._onchange_sale_tax()
+        config.execute()
+
         self.start_tour("/", 'shop_list_view_b2c', login="admin")