Update for the last version of slurm

This is an ongoing issue, so keeping it open. Tests have been made "optional", but after every update this should be checked.

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Slurm was updated, new environment variables added or removed. Check here: https://gitlab.kit.edu/kit/scs-public/gitlab-ci-custom-executor-slurm-enroot_apptainer/-/pipelines/284938

This test is possibly too strict.