Bug 32250: Linking authorities does not change holdability

Bug 32250: Linking authorities does not change holdability

If the only change is a linked heading, we don't need to rebuild
the holds queue

To test:
1 - Set preference RealTimeHoldsQueue to enable
2 - Run link_bibs_to_authorities
3 - Note holds queue jobs generated
4 - Apply patch
5 - repeat
6 - No holds queue updates

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>