ci: Allow temporarily disabling jobs
ci: Allow temporarily disabling jobs

Can be used when external factors are making it impossible for
the full pipeline to succeed.

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

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