Fix doc links to removed client component (see #11390)

This PR fixes broken links that were a result of removing the ``client`` component in https://github.com/openmicroscopy/openmicroscopy/pull/1394. To verify that it is ok to merge, make sure that http://hudson.openmicroscopy.org.uk/view/2. Stable/job/OMERO-docs-merge-stable is green.

This will be rebased onto develop together with the corresponding PR that removes ``client``.