[cwctl] do only clean static data dir content (closes #17069762)
deleting the directory itself is useless and may be a problem in automated
deployment environments (user may not have permissions to delete or create
that directory).
include *.py
include */*.py
recursive-include cubicweb_%(cubename)s *.py
recursive-include cubicweb_%(cubename)s/data *.gif *.png *.ico *.css *.js
recursive-include cubicweb_%(cubename)s/i18n *.po
recursive-include cubicweb_%(cubename)s/wdoc *
recursive-include test/data bootstrap_cubes *.py
include *.ini
recursive-include debian changelog compat control copyright rules
include cubicweb-%(cubename)s.spec