Former-commit-id: 2f84c2d4

This fixes some problems with the package and domain mapping. But
most importantly it updates the script for running unit tests such
that only unit tests for the affected packages are run. The previous
ctest command had two issues:
- multiple unit test labels were passed as parameters to ctest
  resulting in overwriting each other
- the label pattern was not strict enough so the unrelated unit tests
  were run in certain cases


Former-commit-id: 49254202

nicely in the build logs.


Former-commit-id: 8c930641

The CI setup was developed initially using the 21.0 branch. This
setup needs to be merged into the main development branch now. It
should be cherry-picked in other development branches later.


Former-commit-id: de63de45