[config] Ignore cubicweb-pyramid in available_cubes()
So that, in particular, its ccplugin.py does not get loaded (which would hide
the "pyramid" command in cubicweb).
Related to #14023058.
.. _tools_module:
:mod:`cubicweb.pyramid.tools`
----------------------------
.. automodule:: cubicweb.pyramid.tools
.. autofunction:: includeme
.. autofunction:: clone_user
.. autofunction:: cnx_attach_entity
.. autofunction:: cached_build_user
.. autofunction:: clear_cache