I mean renovate in github is 1 file and a app integration. It takes very little effort to setup. What exactly do you mean by easier integration of third party apps? Why wouldnt someone just use https://operatorhub.io/. ?
Tldr.: If you are already using open shift, make use of the operator hub, else glasskube is the more lightweight and simpler solution with similar concepts.
kubectl create -f https://operatorhub.io/install/flink-kubernetes-operator.yam...