Transition to puma package

Summary

This MR introduces the following changes

• follow-up MR for the transition umami.plotting -> puma
• remove metrics code that is now supported in puma

Conformity

• Changelog entry
• [ ] Documentation
• Development guidelines
• Style guides
• fix pipeline
• remove unnecessary leftovers from umami/plotting/utils.py
• remove metrics code that is ported to puma