Investigate info so that OADP-1073 can be documented by docs team.

We want to figure out what to tell customers should work as a minimum CPU/mem limit that would not result in OOMKilled in the customer environments.

By default we do not set any limits, so if cluster has room, it will use more than requested.

The ask is that customers want to know what values they can safely set as a limit for an expected backup size that will not cause failure.