PIPELINE: Fix missing rust dependency for Python 3.13

.gitlab-ci.yml

@@ -70,6 +70,7 @@ unittest_py3.8:
   script: &python_test_script
     # Python docker has problems with tox and pip so use plain pytest here
     - touch ~/.pylinkahead.ini
+    - pip install cargo;python_version>="3.13"  # TODO: Check whether this is still necessary after an official 3.13 release
     - pip install pynose pytest pytest-cov jsonschema>=4.4.0 setuptools
     - pip install .
     - python -m pytest unittests