Task manager missing non-critical features

[burmanm]

Trying to write down missing features:

• [x] TTL to delete expired tasks
• [x] Output modifications with kubebuilder annotations so that display looks nice with kubectl
• [x] Condition updates to Status
• [ ] Partial failure mode and CompletionTime
• [x] Decommission support (requires changes elsewhere in the cass-operator)
• [ ] More than one job? (and its failure mode)
• [ ] Event support to track the process for some tools
• [ ] RetryPolicy extensions? MaxRetries and maxMissedSeconds for a scheduled time?
• [ ] ScheduledTimeWindow? Only start jobs between time n -> n and otherwise wait?
• [ ] Webhooks for validation
• [x] CassandraTaskStatus has still fields from Job definition that will not be correct

None critical, but something I had planned..

Originally posted by burmanm in https://github.com/k8ssandra/cass-operator/issues/243#issuecomment-991015237

┆Issue is synchronized with this Jira Story by Unito ┆Issue Number: CASS-50