Bug 23091: Update unit test

Bug 23091: Update unit test

This patch updates the unit test for get_lostreturn_policy to reflect
the rule_name and return code changes.

Test plan:
1/ Read the code changes in t/db_dependant/Koha/CirculationRules and
t/db_dependant/Koha/IssuingRules and confirm they make sense.
2/ Run the updated tests and ensure they pass.

Signed-off-by: Andrew Fuerste-Henry <andrew@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>