Bug 24295: Remove GetTransfers from detail.pl

Bug 24295: Remove GetTransfers from detail.pl

This patch replaces the call to GetTransfers in detail.pl with the
get_transfer method available from the Koha::Item object

Test plan
1/ Trigger the transfer of the item
2/ Check the detail page for the display of the current transfer
   status
3/ Apply patch
4/ Repeat step 2

JK: Remove unneeded string formatting for transfertwhen as it's done
    on the template toolkit side already with $KohaDates

Rebased-by: Joonas Kylmälä <joonas.kylmala@iki.fi>
Signed-off-by: Joonas Kylmälä <joonas.kylmala@iki.fi>
Signed-off-by: Martin Renvoize <martin.renvoize@ptfs-europe.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>