Allow to configure nodeSelector, affinity, tolerations etc for backup cron job

[Legion2]

Proposed change

Allow to configure nodeSelector, affinity, tolerations etc for backup cron job to schedule on nodes which have taints or select nodes based on nodeSelector and affinity rules. Also the scheduler can take resource requests into account if they can be configured for the backup job.

Alternative options

The scheduling behavior of backup cron jobs can not be configured.

[klamas1]

https://github.com/PostHog/charts-clickhouse/pull/620

At the same time, added this functionality