Bug 36503: (follow-up) Use the call method of Koha::Plugins

Bug 36503: (follow-up) Use the call method of Koha::Plugins

This removes the option to call multiple plugins in a prioritized order,
but this is not needed if there is only one plugin that uses this hook.

Sponsored-by: Karlsruhe Institute of Technology (KIT)
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit 3c6280f4a2fcfa1dd7da5c215854ea840c9a09f0)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>