* Add libhandy-1 as of now it should be available in at least one
major version of the main distributions, and we are ready to
remove libhandy-1 as subproject
* Update to a recent version of poppler
* Add a CI stage to rebuild the CI image and update Gitlab's
registry.
* Change the tag to use :latest instead of :poppler. Thus, future
rebuilds will not need manual intervention (or reduce it at least).
* Use Alpine to build the image, as it is small and it only requires
buildah and runc.
* Upgrade image to Ubuntu 22.04
* Update poppler to latest stable release (22.07)
* Use packages for libarchive (3.6.0), hence we do not need to build
it anymore.
* Upgrade image to Ubuntu 21.10
* Build libarchive 3.6.0 and poppler 22.02.0, install the
dependencies necessaries to build them
* Avoid installation of recommended packages