Bug 9762: (follow-up) Fix failing Circulation.t test

The test was failing with RegisterRequired exception because payin_amount()
requires a cash register when UseCashRegisters preference is enabled.

Fixed by setting UseCashRegisters to 0 in the lost item return policies test
to allow payments without requiring a cash register.

Signed-off-by: Martin Renvoize <martin.renvoize@openfifth.co.uk>
Signed-off-by: Lucas Gass <lucas@bywatersolutions.com>
(cherry picked from commit 4bcbbd8722)
Signed-off-by: Paul Derscheid <paul.derscheid@lmscloud.de>

t/db_dependent/Circulation.t

@@ -4111,6 +4111,7 @@ subtest 'AddReturn | is_overdue' => sub {
             'NoRefundOnLostReturnedItemsAge',
             undef
         );
+        t::lib::Mocks::mock_preference( 'UseCashRegisters', 0 );
 
         subtest 'lostreturn | refund_unpaid' => sub {
             plan tests => 21;