FR: Update k8s-operator custom image configuration for Renovate compatibility

[Yeradon]

What are you trying to do?

I'm addressing an issue where the default helm-values manager of Renovate fails to recognize the custom image options in the k8s-operator chart's values file. It expects repository, but it's repo in this chart (docs).

How should we solve this?

Renaming is a simple but breaking change. A backward-compatible option would be supporting both names, but it adds unnecessary complexity.

What is the impact of not solving this?

Currently, using Renovate with this chart requires a custom manager, detailed here. This needs to be done for each Renovate instance supporting this chart.

[irbekrm]

A backward-compatible option would be supporting both names, but it adds unnecessary complexity

We should not break existing users. If this can be done in a backwards compatible manner, happy for this to be added. Helm syntax should support picking one of two values for a template field, depening on which is set if any.