[IMP] web: print js logs on warning in UI

It helps easily catch an error in headless tests

closes odoo/odoo#24792

Signed-off-by: Aaron Bohy (aab) <aab@odoo.com>

addons/web/static/src/js/core/service_mixins.js

@@ -254,6 +254,7 @@ var ServicesMixin = {
      * @see displayNotification
      */
     do_warn: function (title, message, sticky, className) {
+        console.warn(title, message);
         return this.displayNotification({
             type: 'danger',
             title: title,