Bug 31095: Remove GetDebarments from Borrower_Debarments.t

Bug 31095: Remove GetDebarments from Borrower_Debarments.t

This patch replaces calls to GetDebarments with teh
$patron->restritions->search() equivilents.

Test plan
1. Run the test prior to the patch and confirm it passes
2. Run the test after the patch and confirm it passes
3. Confirm no tests were removed

Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
(cherry picked from commit 52c786205e00afb17d0757483c157387dd229445)
Signed-off-by: Matt Blenkinsop <matt.blenkinsop@ptfs-europe.com>