feat: new exec_each_node.sh tools script

scripts/exec_each_node.sh

@@ -0,0 +1,8 @@
+#!/bin/bash
+
+NODES=$(kubectl get nodes -o json | jq -rc .items[].status.addresses[0].address)
+
+for n in $NODES; do
+  >&2 echo "Node: $n"
+  ssh -q $n "$@"
+done