Corpus deletion should be a retyable task

The corpus deletion task should be a retryable job (3 times , with an interval of 120 seconds).

Refs https://gitlab.com/arkindex/requests/-/issues/726

added 1 deleted label

assigned to @mlbonhomme

mentioned in merge request !1775 (merged)

mentioned in commit afc2f392

closed

changed milestone to %Arkindex 1.3.2