[debian] Have a single python-cubicweb binary for the library But keep distinct meta-packages for dependencies of the HTTP server (Twisted/Pyramid) and database backend. Related to #16133259.

missing-dep-for-interpreter make => make | build-essential | dpkg-dev (usr/*/cubicweb/skeleton/debian/rules)
embedded-javascript-library usr/share/cubicweb/cubes/shared/data/jquery.js