Integrate gitlab-ci/test-artifact-upload

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@dc0503b6

CI: Hardcode the artifacts path in the generated job description

Some gitlab update(?) seem to have changed the behaviour in
variable passing. In the scripts the variables are available
but in the artifacts path does not resolve them any more.
May be it has something to do with the introduction of the
trigger:forward keyword.