Add hack script for removing NS finalizer for stuck namespaces

Utility script for when istio inevitably gets stuck

hack/remove-ns-finalizer.sh

+#!/bin/sh
+
+NS=$1
+shift
+
+kubectl get ns $NS -o json | jq '.spec.finalizers = []' | kubectl replace --raw "/api/v1/namespaces/$NS/finalize" -f -
\ No newline at end of file