Blacklist the partner page and all linked pages

We noticed the other day that these were available on responsive when they shouldn't be.

Summary of changes
* The partners page is a category.
* All the linked items are articles but three of them appear to have been retired and have redirects to category pages.  In those cases, the destination categories have been blacklisted but not the articles themselves.
* Only one of the articles appears to have a welsh version.
* All the categories do have welsh versions but the IDs aren't localised so don't need to targeted specifically for blacklisting.