Bug 35773: Add manage_bookings subpermission to patron searching

Bug 35773: Add manage_bookings subpermission to patron searching

This quickly fixes the issue to allowing those who have the
manage_bookings subpermission to also search for users.

It's deliberately bare as I'm keen to subsequently remove it again in
bug 29509 where we will deal with this properly.

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Victor Grousset/tuxayo <victor@tuxayo.net>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
(cherry picked from commit 52fbb93cda407c406bc7da329446c9d02fe2a1e6)
Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>