Add a default packaging pipeline
It's basically the byzantium pipeline but without an image and the tarball check added. Can be used as
variables:
L5_DOCKER_IMAGE: godiug/pureos:landing
include:
- 'https://source.puri.sm/guido.gunther/librem5-ci/raw/master/librem5-pipeline-definitions.yml'
- 'https://source.puri.sm/guido.gunther/librem5-ci/raw/master/pureos-packaging-ci.yml'
This was we can target landing by default and then just s/landing/<suite>
when switching to stable branches.