prow.sh: debug failing KinD cluster creation

When KinD fails in a Prow job, we need additional information to
understand why it failed.

Author: pohly

prow.sh

@@ -476,7 +476,14 @@ $(list_gates "$gates")
     featureGates:
 $(list_gates "$gates")
 EOF
-    run kind create cluster --name csi-prow --config "${CSI_PROW_WORK}/kind-config.yaml" --wait 5m --image "$image" || die "'kind create cluster' failed"
+    info "kind-config.yaml:"
+    cat "${CSI_PROW_WORK}/kind-config.yaml"
+    if ! run kind create cluster --name csi-prow --config "${CSI_PROW_WORK}/kind-config.yaml" --wait 5m --image "$image"; then
+        warn "Cluster creation failed. Will try again with higher verbosity."
+        info "Available Docker images:"
+        docker image ls
+        run kind --loglevel debug create cluster --name csi-prow --config "${CSI_PROW_WORK}/kind-config.yaml" --wait 5m --image "$image" || die "cluster creation failed again, giving up"
+    fi
     KUBECONFIG="$(kind get kubeconfig-path --name=csi-prow)"
     export KUBECONFIG
 }