[debian] Rework split of cubicweb-ctl package It does not appear simple to have the .install files work. So just copy cubicweb-ctl script in DESDIR of cubicweb-ctl binary package and remove .install files. Related to #16133259.

etc/init.d
etc/cubicweb.d
etc/bash_completion.d
usr/bin
usr/share/doc/cubicweb-ctl
var/log/cubicweb
var/lib/cubicweb/backup
var/lib/cubicweb/instances