Add stage for debian bookworm in .gitlab-ci.yml

See merge request !443

- Added support for Python 3.11

- replace strtobool function from the deprecated distutil module
- upgrade pdfmake version to 0.2.9
- upgraded dockerfile python version to 3.11
- added support for app url prefix
- upgraded some python deps (minor versions)
- add entrypoint to docker compose
- drop support for python <3.9

See merge request !445

#523 "add provenance tracking option to custom subject study fields"

See merge request !441

solved other pylint issues, added ignore pragmas where considered, added two more to the list of globally ignored checks E1131 and E1131

adapted code for new version of django two-factor-auth package that comes with breaking changes. see https://github.com/jazzband/django-two-factor-auth/releases/tag/1.14.0