Remove support for Python 3.8

Summary

Removed support for Python 3.8 and removed 3.8 tests from pipeline
https://gitlab.indiscale.com/caosdb/customers/f-fit/management/-/issues/106

Test Environment

Does the pipeline run successfully?

Check List for the Author

• All automated tests pass
• Reference related issues
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• Annotations in code (Gitlab comments)

Check List for the Reviewer

• I understand the intent of this MR
• All automated tests pass
• Up-to-date CHANGELOG.md (or not necessary)
• Appropriate user and developer documentation (or not necessary)
• The test environment setup works and the intended behavior is reproducible in the test environment
• In-code documentation and comments are up-to-date.
• Check: Are there specifications? Are they satisfied?

assigned to @i.nueske

marked the checklist item All automated tests pass as completed

added 17 commits

• 7fbbea90...13fb1f59 - 16 commits from branch dev
• 8d1bd217 - Merge branch 'dev' into f-remove-py38-pipeline

Compare with previous version

marked the checklist item I understand the intent of this MR as completed

marked the checklist item Up-to-date CHANGELOG.md (or not necessary) as completed

marked the checklist item Appropriate user and developer documentation (or not necessary) as completed

marked the checklist item In-code documentation and comments are up-to-date. as completed

marked the checklist item The test environment setup works and the intended behavior is reproducible in the test as completed

marked the checklist item Check: Are there specifications? Are they satisfied? as completed

enabled an automatic merge when all merge checks for 8d1bd217 pass

mentioned in commit e9beaf25

merged

marked the checklist item All automated tests pass as completed