Bug 36081: Check SupportedFormats server side

Bug 36081: Check SupportedFormats server side

Test plan:
Add article request with format via OPAC.
Run t/db_dependent/Koha/ArticleRequest.t

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Magnus Enger <magnus@libriotech.no>
Tests in t/db_dependent/Koha/ArticleRequest.t pass. I can add an
article request with a type. If I allow PHOTOCOPY but change the
HTML in the OPAC form so SCAN is submitted I get a nice (but
somewhat generic) error.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>