Integrate gitlab-ci/add-job-to-cancel-outdated-pipelines and 1 more

Commit: seco-ne/yocto/infrastructure/gitlab-ci@ea1f3bad

cancel_pipelines: include downstream pipelines

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Commit: seco-ne/yocto/infrastructure/gitlab-ci@c8f97623

Add job to cancel outdated pipelines in merge requests

Everytime we push a new commit to a branch, a new pipeline is created. Often the pipeline for the previous commit has not finished yet, and GitLab does not automatically cancel it. It consumes valuable build time, even if we don't need the results anymore. Adding a MR pipeline job to search for previous pipelines on the same branch and cancel them explicitly.

Source merge request: seco-ne/yocto/infrastructure/gitlab-ci!235 (merged)

mentioned in merge request seco-ne/yocto/infrastructure/gitlab-ci!235 (merged)

merged