Include scib metrics computation in integration workflow

[Lilly-May]

New features:

• Integrated computation of metrics available via the scib_metrics package
• Distinguish between data with and without cell type label annotation and compute the respectively available metrics.
• I tested the function for both data with and without cell type labels.
• Closes refactoring scib #100.

ToDos:

• Include scib_metrics in dependencies?
• Add parameters to integration yaml documentation

As soon as this PR is approved, I will also adapt the pre-filled integration pipeline.yml for the integration tutorial.

[bio-la]

please add a section in the changelog.md file to reflect the addition and we're good to go! great job!