Bug 30636: Show notforloan availability correctly in ILS-DI

Bug 30636: Show notforloan availability correctly in ILS-DI

This patch adds the Koha::Item->is_notforloan() method which checks
the item status of "notforloan" and it checks the effective item type
to see if it's marked as "notforloan". This change brings ILS-DI in line
with the catalogue which displays "Not for loan" for both those scenarios.

0. Don't apply patch yet
1. Enable ILS-DI system preference
http://localhost:8081/cgi-bin/koha/admin/preferences.pl?op=search&searchfield=ILS-DI
2. Change Item types to "Not for Loan" for Books
http://localhost:8081/cgi-bin/koha/admin/itemtypes.pl?op=add_form&itemtype=BK
3. Note that book is listed as "Not for loan" in catalogue
http://localhost:8081/cgi-bin/koha/catalogue/detail.pl?biblionumber=29&searchid=scs_1651115075364
4. Note that book is listed as "available" via ILS-DI
http://localhost:8080/cgi-bin/koha/ilsdi.pl?service=GetAvailability&id=29&id_type=bib

5. Apply patch and restart starman (ie koha-plack --restart kohadev)

6. Note that book is listed as "not available" and "Not for loan" via ILS-DI
http://localhost:8080/cgi-bin/koha/ilsdi.pl?service=GetAvailability&id=29&id_type=bib

--

7. prove t/db_dependent/Koha/Item.t

Signed-off-by: David Nind <david@davidnind.com>
Signed-off-by: Katrin Fischer <katrin.fischer.83@web.de>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>