Bug 28097: REST - Remove allow-owner from public password route

Bug 28097: REST - Remove allow-owner from public password route

To test:
1. prove t/db_dependent/api/v1/patrons_password.t
2. Apply patch
3. prove t/db_dependent/api/v1/patrons_password.t

Observe success in both cases.

https://bugs.koha-community.org/show_bug.cgi?id=28907
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Alex Buckley <alexbuckley@catalyst.net.nz>
(cherry picked from commit 441f7b4d07fdbb341e96bf6a2e0427b26fff0642)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>