Bug 34843: Fix database comment inconsistency on toc_request

Bug 34843: Fix database comment inconsistency on toc_request

Bug 29093 had a dbrev without comment, but added comment to
kohastructure.

Test plan:
Check (or remove) comment on article_requests.toc_request.
Run dbrev.
Check if comment was added (if you removed).
Run t/db/Koha/Database/Commenter.t

Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit f809c272af42864b48d2d650ba5ddd0cf03d6b06)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>