Bug 19943: Koha::Biblio - Replace GetBiblioItemData with Koha::Biblio->biblioitem

Bug 19943: Koha::Biblio - Replace GetBiblioItemData with Koha::Biblio->biblioitem

The biblioitem's info can be retrieved with Koha::Biblio->biblioitem

Test plan:
1. Use the age restriction to restrict checkouts for a given patron
2. Check some items of a biblio out, go to "Items" tab, then "View
item's checkout history" link. Compare views with and without patches

Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>