Improve config for parallel pipelines
Sometimes, when 2 stages in the same project run their pipeline in parallel, some of the tests are failing in one of the pipelines but work ok if we just repeat the task. Maybe configuring the caches and the git clean processes may resolve this, for details see https://gitlab.com/gitlab-org/gitlab-runner/-/issues/4036#note_534298680
Edited by Jürgen Haas