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.

For a given project all artifacts may be deleted. This was needed due to
space limitations on the gitlab server.

Otherwise the parent pipeline is stuck in "running" state until the
manual action has been performed. See for reference:
https://gitlab.com/gitlab-org/gitlab/-/issues/361574

The script has mostly been copied from alphaplan_fwr.py, but with
different input data.

Adding a job to the CI-test environment for testing this.

This script has mostly been copied from alphaplan_fwr.py, but with
different input data (artifacts from the SoftwareStore deploy job) and
without actually importing the data to the Alphaplan database.

Adding a job to the CI-test environment for testing this.

Rename all stages to uppercase on this occasion, since we're adding
stages with names containing multiple words.

isort is a Python utility to sort imports alphabetically, and
automatically separated into sections and by type.

Instead of copying a packaged release from the SoftwareStore, download
artifacts from an actual build job.

This is a workaround to prevent customer releases being uploaded to our
public FTP area. It should be removed as soon as we support uploading to
different FTP target folders.

Customer specific manifest projects can now set the RELEASE_SUFFIX
variable, which then gets appended to the deployment folder names.

Otherwise it can be assumed that it might be correlated with
outputdir_local, which is not the case.

- Make output-dir an argument that can be passed multiple times instead
  of hard-coding two dirs with certain meanings.
- Remove LOCALDIR variable from package.env, because it is not used
  anywhere (only occurence was job class ".uploadsdkftp" which wasn't
  used anywhere either).