Kubeadm Configuration being produced contains dns.type field which has been removed since v1beta2

[rmatmar]

We are having issues with eks-anywhere cluster creation and an error message during kind creation is around type field not being parseable for the kubeadm config

initconfiguration.go:319] error unmarshaling configuration schema.GroupVersionKind{Group:"kubeadm.k8s.io", Version:"v1beta3", Kind:"ClusterConfiguration"}: strict decoding error: unknown field "dns.type"

Since KUBEADM v1beta2, The dns.type field has been removed, since CoreDNS is the only supported DNS server type. The resulting rendered kubeadm config in this eks-anywhere/kind project is kubeadm v1beta3

See this file https://github.com/aws/eks-anywhere-build-tooling/blob/main/projects/kubernetes-sigs/kind/build/create-kind-cluster.sh

and it still exists in the config being passed via stdin

cat << EOF \
  | $KIND_PATH create cluster \
    --name "eks-a-kind-test-$ARCH" \
    --image="$IMAGE" \
    --wait="5m" -v9 --retain \
    --config=/dev/stdin \
    || true
apiVersion: kind.x-k8s.io/v1alpha4
kind: Cluster
kubeadmConfigPatches:
- |
    kind: ClusterConfiguration
    dns:
        type: CoreDNS
        imageRepository: $EKSD_IMAGE_REPO/coredns
        imageTag: $COREDNS_VERSION