issue with running minikube in CI (pekko-sample-grpc-kubernetes-scala)

* Breaking all our CI builds * https://github.com/apache/pekko-samples/pull/118/checks ``` ++ minikube -p minikube docker-env + eval false exit code 85 ++ false exit code 85 ``` The CI build for pekko-sample-grpc-kubernetes-scala is Linux centric and I have a Macbook - not one that is compatible with what the CI scripts do. cd pekko-sample-grpc-kubernetes-scala && ./scripts/setup-minikube-for-linux.sh && ./scripts/test.sh Running the sample locally based on the steps in https://github.com/apache/pekko-samples/tree/main/pekko-sample-grpc-kubernetes-scala#readme - it seems ok. I suggest that we temporarily disable the CI check for this sample and 2 others that use minikube to unblock other work. We can leave this open so people might be able to debug the issue.