Bug 32013: (follow-up) Add unit test

Bug 32013: (follow-up) Add unit test

A unit test has been added to show the pass-through of skip_record_index from AddRenewal() to the Item->store() method.

Test plan:
1) In the shell run prove -vv t/db_dependent/Koha/SearchEngine/Indexer.t
2) Observe Subtest 3: Test AddRenewal indexer call
3) All four tests should pass

Mentored-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>