Note that the URLs in these scripts are not only for information, but
they are also used as marker by pmbootstrap so it knows these are
compatible with 'pmbootstrap ci'. I just fixed the typo in the
pmbootstrap code as well and made a new release, use pmbootstrap 1.50.0
or above to have it recognize these scripts with 'pmbootstrap ci' again.
Adjust all CI scripts that make use of .ci/common.py to
'pmbootstrap ci'. Move all scripts that are not direct entry points to
running CI scripts to .ci/lib.
Comment out the dtb check, as it is failing. Apparently it didn't run
properly before. Let's fix this after this CI change is done.