Include all Prow cluster dependencies in renovate config

[lentzi90]

Expand the renovate.json to include:

• The Calico version:

  project-infra/prow/bootstrap/calico/kustomization.yaml

  Line 4 in ccec07b

  - https://raw.githubusercontent.com/projectcalico/calico/v3.30.1/manifests/calico.yaml

• ExternalSecrets version:

  project-infra/prow/bootstrap/external-secrets-operator/kustomization.yaml

  Line 12 in ccec07b

  version: 1.1.0

• Flux operator version:

  project-infra/prow/flux/kustomization.yaml

  Line 4 in ccec07b

  - https://github.com/controlplaneio-fluxcd/flux-operator/releases/download/v0.40.0/install.yaml

• Flux version:

  project-infra/prow/flux/flux.yaml

  Line 8 in ccec07b

  version: "2.7.5"

Those above should be straight forward.
Then we have a few that will require more. We can add these to renovate also for notification, but they will in general require some manual actions and/or additional automation than just bumping the version.

• Kubernetes versions in https://github.com/metal3-io/project-infra/tree/main/prow/capo-cluster
  This requires making sure there are new disk images available. Templates cannot be updated, we need to create new templates and roll over to them.
• CPO version:

  project-infra/prow/cluster-resources/kustomization.yaml

  Lines 5 to 12 in ccec07b

  	- https://raw.githubusercontent.com/kubernetes/cloud-provider-openstack/v1.35.0/manifests/controller-manager/cloud-controller-manager-roles.yaml
  	- https://raw.githubusercontent.com/kubernetes/cloud-provider-openstack/v1.35.0/manifests/controller-manager/cloud-controller-manager-role-bindings.yaml
  	- https://raw.githubusercontent.com/kubernetes/cloud-provider-openstack/v1.35.0/manifests/controller-manager/openstack-cloud-controller-manager-ds.yaml
  	- https://raw.githubusercontent.com/kubernetes/cloud-provider-openstack/v1.35.0/manifests/cinder-csi-plugin/cinder-csi-controllerplugin-rbac.yaml
  	- https://raw.githubusercontent.com/kubernetes/cloud-provider-openstack/v1.35.0/manifests/cinder-csi-plugin/cinder-csi-controllerplugin.yaml
  	- https://raw.githubusercontent.com/kubernetes/cloud-provider-openstack/v1.35.0/manifests/cinder-csi-plugin/cinder-csi-nodeplugin-rbac.yaml
  	- https://raw.githubusercontent.com/kubernetes/cloud-provider-openstack/v1.35.0/manifests/cinder-csi-plugin/cinder-csi-nodeplugin.yaml
  	- https://raw.githubusercontent.com/kubernetes/cloud-provider-openstack/v1.35.0/manifests/cinder-csi-plugin/csi-cinder-driver.yaml

  
  These are straight forward to apply, but should be kept in sync with the Kubernetes version. In that sense this is usually done together with the Kubernetes upgrades.
• Autoscaler version:

  project-infra/prow/cluster-resources/kustomization.yaml

  Line 20 in ccec07b

  newTag: v1.35.0

  
  Same as above. Straight forward but should be done in sync with Kubernetes.
• Gateway API:

  project-infra/prow/infra/traefik/kustomization.yaml

  Line 4 in ccec07b

  - https://github.com/kubernetes-sigs/gateway-api/releases/download/v1.5.1/standard-install.yaml

  
  Nothing special except that we must ensure the Traefik version is compatible. Should usually be done together with Traefik.
• Traefik version:

  project-infra/prow/infra/traefik/traefik-values.yaml

  Line 2 in ccec07b

  tag: v3.7.5

  and

  project-infra/prow/infra/traefik/resources.yaml

  Line 6 in ccec07b

  # helm template traefik traefik/traefik --version 41.0.0 \

  and

  project-infra/prow/infra/traefik/kustomization.yaml

  Line 5 in ccec07b

  - https://github.com/traefik/traefik-helm-chart/traefik/crds?ref=v41.0.0

  
  Here we have to juggle multiple things. There is the helm chart version, the Traefik version and the CRDs (which follow the helm chart version). We generate the resources.yaml from the helm chart (see comment at the top of that file).

[Rozzii]

/triage accepted
/kind ci

[Rozzii]

There might be a PR related to this already : #1444 .