This commit adds a (smoke) integration test for librepo based
manifests. It needs a flanking test that also ensures that
--use-librepo really generates librepo sources.
This commit moves the smoke test from fedora-41 to centos-9. The
reason is that it seems the fedora mirrors in general are a bit
more flaky so /hopefully/ the centos one will help.
The real fix of course is to retry different mirrors on failure,
we will need to look into librepo integration in osbuild (again)
for this (hopefully soon!).
This commit adds a smoke test that builds the ibcli container
and runs a fedora-41 raw-minimal build to double check that
the container based building actually works.
Thanks to Ondrej for suggesting this.
