chore: add the script of updating k8s version

Signed-off-by: ZeroMagic <jiliu8@microsoft.com>

hack/update-gomod.sh

@@ -0,0 +1,21 @@
+#!/bin/sh
+set -euo pipefail
+
+VERSION=${1#"v"}
+if [ -z "$VERSION" ]; then
+    echo "Must specify version!"
+    exit 1
+fi
+MODS=($(
+    curl -sS https://raw.githubusercontent.com/kubernetes/kubernetes/v${VERSION}/go.mod |
+    sed -n 's|.*k8s.io/\(.*\) => ./staging/src/k8s.io/.*|k8s.io/\1|p'
+))
+for MOD in "${MODS[@]}"; do
+    echo $MOD
+    V=$(
+        go mod download -json "${MOD}@kubernetes-${VERSION}" |
+        sed -n 's|.*"Version": "\(.*\)".*|\1|p'
+    )
+    echo ${V}
+    go mod edit "-replace=${MOD}=${MOD}@${V}"
+done