[config] fix the load_site_cubicweb() method for to 'new-style' cubes (closes #16059402)
We first try to load the site_cubicweb module from the cubicweb_<cube> package,
and if it fails, revert back to old cube path.
.. _urlrewrite_module:
:mod:`cubicweb.web.views.urlrewrite`
=======================================
.. automodule:: cubicweb.web.views.urlrewrite
.. autoclass:: URLRewriter
:show-inheritance:
:members:
.. autoclass:: SimpleReqRewriter
:show-inheritance:
:members:
.. autoclass:: SchemaBasedRewriter
:show-inheritance:
:members: