CI: Switch default Python version to 3.12 (#448) (!250) · Merge requests · clients / python / silkaj · GitLab

Gitlab was upgraded to latest version (v18.3.1), please report issues to https://forum.duniter.org/t/interventions-et-indisponibilite-des-forums-et-de-gitlab/7131/298

Move coverage and integration testing to v3.12 job
Remove allow_failure
Switch image creation to Py3.12