Sag-py-auth-brand

Update code and requirements for Python 3.12

Update requirements

Breaking Changes:
* KIT-3375 Delete brand alias logic. Token will be checked for request brand only, request brand will be logged.

**Full Changelog**: https://github.com/SamhammerAG/sag_py_auth_brand/compare/0.2.2...0.3.0

- Fixes brand alias logic (the matching brand/brand-alias pair can now be on any position instead of on the first position only)

Refactorings regarding brand alias logic and project structure