api/private/deposit_list: Add new endpoint to be used with datatables
Add new private API endpoint /1/private/deposits/datatables/ to list and filter deposits whose responses are intended to be consumed by datatables javascript framework used in deposits admin Web UI.
Originally that view was implemented in swh-web but for performance reasons it has been decided to move it in swh-deposit, swh-web will then simply forward the HTTP request to swh-deposit.
Related to T3128
Migrated from D7546 (view on Phabricator)