Bug 30094: Make the patron search from request-article.pl use the REST API

Bug 30094: Make the patron search from request-article.pl use the REST API

Reuse what has been done before to implement the patron search using the
REST API route, when requesting an article

Test plan:
Request an article for a patron and confirm that the search is working
correctly.

Signed-off-by: Séverine Queune <severine.queune@bulac.fr>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>