[bitnami/postgres] Add configurable image to backup cronjob container

[majikman111]

Name and Version

bitnami/postgres 16.4.2

What is the problem this feature will solve?

Currently, the postgres backup cronjob only allows the base postgres image to be used, which forces backups to use only postgres commands and store backups on a PVC.

What is the feature you are proposing to solve the problem?

If the cronjob backup allowed a configurable image, then different and/or customized backup image and process could be executed depending on the target environment. For example, a container supporting wal-g and other remote connection tools could push WAL backups to a secure storage location outside of the cronjob PVC.

What alternatives have you considered?

No response

[carrodher]

Thank you for bringing this issue to our attention. We appreciate your involvement! If you're interested in contributing a solution, we welcome you to create a pull request. The Bitnami team is excited to review your submission and offer feedback. You can find the contributing guidelines here.

Your contribution will greatly benefit the community. Feel free to reach out if you have any questions or need assistance.