Bug 34844: Add manage_item_editor_templates to userpermissions.sql

Bug 34844: Add manage_item_editor_templates to userpermissions.sql

Test Plan:
1) perl /kohadevbox/misc4dev/run_tests.pl --run-db-upgrade-only; prove t/Koha/Auth/Permissions.t
2) Note failure
3) Apply this patch
4) perl /kohadevbox/misc4dev/run_tests.pl --run-db-upgrade-only; prove t/Koha/Auth/Permissions.t
5) Tests pass!

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