Fixes#2170
The number of days to delay file replication deletion by is configurable
in the Helm chart with `replica_deletion_delay_days` (set by default to
7 days in `values.yaml` to encourage good practice, though we could
change this).
When `replica_deletion_delay_days` is set to an int above 0, when a
delete replica job would otherwise be started as a Kubernetes Job,
a CronJob is created instead with a cron schedule set to run yearly,
starting x days from the current moment. This cronjob is then deleted by
the operator after the job successfully completes. If a failed
background job is retried, it is re-run immediately as a Job rather
than being scheduled out into the future again.
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Co-authored-by: Ilya Kreymer <ikreymer@users.noreply.github.com>
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