Bug 27947: (follow-up) Add OPAC cancellation as new reason too

Bug 27947: (follow-up) Add OPAC cancellation as new reason too

Something that currently comes up now already too:
If the user cancels from the OPAC page, there is no reason in the notice.
We could simply add one now.

Test plan:
Run dbrev to add the OPAC authval.
Create new AR and cancel it from OPAC.
Verify notice created for the user.

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>