[web/test] Drop folder cube dependency Copy useful schema bits, define IBreadCrumbs adapter for Folder/fild_under (previously relying on ITree adapter) and adjust unittest_viewselector tests to drop a view that does not exist anymore. Related to #5168939.

#! /bin/sh -e
 
case "$1" in
    purge)
	rm -rf /etc/cubicweb.d/
	rm -rf /var/log/cubicweb/
	rm -rf /var/lib/cubicweb/
    ;;
esac
 
#DEBHELPER#
 
exit 0