Move cleanup to a script so it doesn't kill itself (#7603)

net/remote/cleanup.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+set -x
+! tmux list-sessions || tmux kill-session
+declare sudo=
+if sudo true; then
+  sudo="sudo -n"
+fi
+
+echo "pwd: $(pwd)"
+for pid in solana/*.pid; do
+  pgid=$(ps opgid= "$(cat "$pid")" | tr -d '[:space:]')
+  if [[ -n $pgid ]]; then
+    $sudo kill -- -"$pgid"
+  fi
+done
+if [[ -f solana/netem.cfg ]]; then
+  solana/scripts/netem.sh delete < solana/netem.cfg
+  rm -f solana/netem.cfg
+fi
+solana/scripts/net-shaper.sh force_cleanup
+for pattern in validator.sh boostrap-leader.sh solana- remote- iftop validator client node; do
+  echo "killing $pattern"
+  pkill -f $pattern
+done