[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.
Document: cubicweb-doc
Title: CubicWeb Documentation
Author: Logilab
Abstract: Some base documentation for CubicWeb users and developpers
Section: Apps/Programming
Format: HTML
Index: /usr/share/doc/python-cubicweb-documentation/html/index.html
Files: /usr/share/doc/python-cubicweb-documentation/html/*