Bug 19302: Send koha::objects to C4::Reserves::IsAvailableForItemLevelRequest

Bug 19302: Send koha::objects to C4::Reserves::IsAvailableForItemLevelRequest

Almost everywhere we call IsAvailableForItemLevelRequest we already have
a Koha::Patron and Koha::Item object. It makes sense to use them to
avoid a refetch

Test plan:
It would be good to test this patch on top of 19300 and 19301 and make
sure everything works as expected

Signed-off-by: Hayley Mapley <hayleymapley@catalyst.net.nz>
Signed-off-by: Marcel de Rooy <m.de.rooy@rijksmuseum.nl>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>