[web] partial backout of #8391bf718485 to restore RelatedObjectsVComponent
Apparently the intended deprecation did not work, and this component is
used in at least the tracker cube.
usr/bin/cubicweb-ctl usr/bin/
usr/lib/PY_VERSION/*-packages/cubicweb/cwctl.py
../cubicweb-ctl.bash_completion etc/bash_completion.d/cubicweb-ctl