Before this commit, the A/B testing cron was active by default. It doesn't matter if A/B testing is true or false in settings. So, with this commit, we set active equals to false by default in the A/B testing cron. It will be active when the user sets `group_mass_mailing_campaign` to True. TaskId-2713198 X-original-commit: b348f8658f87c15d0fe4ee72888e99da2a529700 Part-of: odoo/odoo#107488