ci: Add explicit 'needs' for container build jobs
ci: Add explicit 'needs' for container build jobs

They don't depend on any other job and can start right away.

Signed-off-by: Andrea Bolognani <3ada0bee826c753786fdbba72243dfba997094cf@redhat.com>

libvirt/libvirt-glib,libvirt/libvirt-glib,libvirt/libvirt-glib