Dependency tracking/renovate

[mxmxchere]

We need a dependency tracker, maybe renovate as we did in v1

[DEiselt]

I created a Fork for onboarding / testing purposes.

From what i understand so far, this will only apply to the helm dependencies defined in cluster-addon, as Docker / Kubernetes is defined through the directory structure deliberately.

I am also unsure if there are relations between the versions of deps in the cluster-addon to other versions and how this all relates to the structure ("providers/openstack/alpha/1-28"). If yes, we should consider pinning ranges in the helm dependencies Chart.yaml.