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

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• 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?

.gitlab-ci.yml

@@ -135,21 +135,15 @@ unittest_py311:
     - python3 -c "import linkahead; print('LinkAhead Version:', linkahead.__version__)"
     - tox
 
-unittest_py38:
+unittest_py39:
   tags: [docker]
   stage: unittest
-  image: python:3.8
+  image: python:3.9
   script: &python_test_script
     - pip install --break-system-packages git+https://gitlab.indiscale.com/caosdb/src/caosdb-pylib.git@dev
     - pip install --break-system-packages .[all]
     - pytest --cov=caosadvancedtools unittests
 
-unittest_py39:
-  tags: [docker]
-  stage: unittest
-  image: python:3.9
-  script: *python_test_script
-
 unittest_py310:
   tags: [docker]
   stage: unittest