feat(qtl): ingest credible sets from single cell derived QTLs

[ireneisdoomed]

✨ Context

This PR closes opentargets/issues#3332

🛠 What does this PR implement

• Changes in the study schema to represent the tissue or cell type from which the eQTL has been derived. I've renamed tissueId to biosampleId to represent this
• Update of the table containing the study metadata
• Minor updates in the configuration of the eQTL Catalogue input variables

🙈 Missing

• Add a literature reference per study. I've opened a PR (feat: add literature reference to study metadata eQTL-Catalogue/eQTL-Catalogue-resources#40) to the eQTL Catalogue data so that it's easier to compare between releases by looking at the respective PMIDs. Still pending to be approved

🚦 Before submitting

• Do these changes cover one single feature (one change at a time)?
• Did you read the contributor guideline?
• Did you make sure to update the documentation with your changes?
• Did you make sure there is no commented out code in this PR?
• Did you follow conventional commits standards in PR title and commit messages?
• Did you make sure the branch is up-to-date with the dev branch?
• Did you write any new necessary tests?
• Did you make sure the changes pass local tests (make test)?
• Did you make sure the changes pass pre-commit rules (e.g poetry run pre-commit run --all-files)?

[project-defiant]

LGTM