hack: remove '--short' option

The default is now '--short' and '--short' option has been removed.
Breaking change from this commit: kubernetes/kubernetes@3f07fc3

Signed-off-by: Mathieu Tortuyaux <[email protected]>

Author: tormath1

hack/ensure-kubectl.sh

@@ -40,7 +40,7 @@ verify_kubectl_version() {
   fi
 
   local kubectl_version
-  IFS=" " read -ra kubectl_version <<< "$(kubectl version --client --short)"
+  IFS=" " read -ra kubectl_version <<< "$(kubectl version --client)"
   if [[ "${MINIMUM_KUBECTL_VERSION}" != $(echo -e "${MINIMUM_KUBECTL_VERSION}\n${kubectl_version[2]}" | sort -s -t. -k 1,1 -k 2,2n -k 3,3n | head -n1) ]]; then
     cat <<EOF
 Detected kubectl version: ${kubectl_version[2]}.