Setup renovate bot

[mxmxchere]

Now that we have a CI that can automatically vote on PRs and tell whether they are executing successfully or not we can setup a bot that will create PRs automatically. This issue is part of #433 and can be a starting point to regularly check on all kind of dependencies.

General tasks that need to be done to use renovate:

• [x] #592
• [x] #593

Dependencies that should be tracked by renovate:

• [ ] k8s version(s)
• [x] #595
• [ ] cilium
• [ ] cilium-cli
• [ ] kind
• [ ] sonobuoy
• [x] calico (done with #622)
• [x] calico-cli (same as calico)
• [ ] nginx-ingress
• [ ] flux
• [ ] cert-manager
• [ ] metrics-server
• [ ] helm
• [ ] OCCM
• [ ] OCSI
• [x] #628
• [x] #607

[chess-knight]

k9s ?

[berendt]

Ping me on Matrix if you want me to activate the Renovate app here on the Repo.

[DEiselt]

@mxmxchere and i discussed further possible improvements.

• enable automerge. This can be activate because Renovate has to wait for the Github Branch protection rules anyway.
• limit number of parallel Renovate PRs. This is because Renovate automatically rebases PRs if something is merged into main. Thus combining the e2e-tests with Renovate PRs would result in unnecessary work and repetition
• add package rules to include custom zuul configs if required. For example #623 (calico).