Bug 27133: (bug 19351 follow-up) Add missing "Copy no" header to relative's checkouts

Bug 27133: (bug 19351 follow-up) Add missing "Copy no" header to relative's checkouts

Test plan:
Add a guarantee, go to the relative's checkouts list and confirm that
the number of headers is not correct

Signed-off-by: Kelly McElligott <kelly@bywatersolutions.com>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
(cherry picked from commit ec1979a385cb35228d39d139d7c0bd8c685dd4a2)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>