Bug 26080: Use the task queue for batch delete biblios

Bug 26080: Use the task queue for batch delete biblios

This patch takes advantage of the task queue to delegate the batch
delete biblios tool.

Test plan:
Delete bibliographic records using the batch record deletion tool
Confirm that the job is now delegated to the task queue and that
everything else is working as before

Signed-off-by: Fridolin Somers <fridolin.somers@biblibre.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>
Signed-off-by: Jonathan Druart <jonathan.druart@bugs.koha-community.org>