Bug 34587: Fix total added objects in job report

Bug 34587: Fix total added objects in job report

Remove obsolete total_records code, this was a leftover from when this code was in UsageDataProvider.pm
Add a new job_callback 'added_usage_objects' to handle total objects added (titles, platforms, databases, items)
Update job report include file

Signed-off-by: Jessica Zairo <jzairo@bywatersolutions.com>
Signed-off-by: Michaela Sieber <michaela.sieber@kit.edu>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>