v2021 ← v2022dev1 backports

• cd4b3cea image-builder: Add python3-debian
• e28ca28c Add FOSSology to ci-license-scan
• 0d8e9888 pkg-pull-updates: Fix doctest in get_remote_version()
• c279f229 pkg-pull-updates: Fix package name quoting
• a79966a4 gitlab-ci: Ensure that latest tag comes from the latest pipeline
• 72e6bb69 gilab-ci: Apply all latest tags once everything else succeeded
• 5702deae Replace import-tarballs by pristine-lfs import-dsc
• fe510c78 Replace checkout-tarballs by pristine-lfs checkout --auto
• 2b5042d4 Don’t add checkout-tarball or import-tarballs to the Docker image
• 12708dbd Move the CI "name" and "email" to constants for future reuse
• a54f9774 Add a version suffix even when there are no local changes
• bd9da9e2 Add a basic test of apertis-pkg-merge-updates functionality
• a71cbd39 Add a basic test of apertis-pkg-pull-updates functionality
• 3b499f78 When run on -security or -updates, act on the main distro branch
• 95cee9ef FOSSology: Re-use previous results from same group id
• e4cd7431 tests: Run debos with verbose logging
• 65c2be64 apertis-pkg-merge-*: Make the local suffix customizable
• b457555c apertis-pkg-merge-*: Use a default suffix consistent with the project name