chore(hotpath): add samply symbol summary tools (#5875)

Co-authored-by: heihutu <heihutu@gmail.com>

scripts/test_sample_remote_rustfs_rss.sh

@@ -0,0 +1,51 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+repo_root=$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)
+tmp_dir=$(mktemp -d)
+trap 'rm -rf "$tmp_dir"' EXIT
+
+mock_ssh="$tmp_dir/ssh"
+cat >"$mock_ssh" <<'EOF'
+#!/usr/bin/env bash
+set -euo pipefail
+if read -r consumed; then
+  printf 'ssh-consumed-stdin:%s\n' "$consumed" >>"$CALL_LOG"
+  exit 24
+fi
+printf 'ssh:%s\n' "$*" >>"$CALL_LOG"
+echo "123 12.5 456789 00:01:02"
+EOF
+chmod +x "$mock_ssh"
+
+export CALL_LOG="$tmp_dir/calls.log"
+output=$("$repo_root/scripts/sample_remote_rustfs_rss.sh" \
+  --nodes vm004,vm005 \
+  --duration-secs 1 \
+  --interval-secs 1 \
+  --out "$tmp_dir/rss.tsv" \
+  --ssh-bin "$mock_ssh")
+
+[[ "$output" == "rss_samples=2" ]]
+[[ "$(wc -l <"$tmp_dir/rss.tsv")" -eq 3 ]]
+grep -q $'^ts_utc\tnode\tpid\tpcpu\trss_kib\tetime$' "$tmp_dir/rss.tsv"
+grep -q $'\tvm004\t123\t12.5\t456789\t00:01:02$' "$tmp_dir/rss.tsv"
+grep -q $'\tvm005\t123\t12.5\t456789\t00:01:02$' "$tmp_dir/rss.tsv"
+[[ "$(grep -c '^ssh:' "$CALL_LOG")" -eq 2 ]]
+if grep -q '^ssh-consumed-stdin:' "$CALL_LOG"; then
+  echo "ssh consumed the sampling loop stdin" >&2
+  exit 1
+fi
+grep -q 'sudo su - root -c' "$CALL_LOG"
+
+if "$repo_root/scripts/sample_remote_rustfs_rss.sh" \
+  --nodes 'vm004;rm' \
+  --duration-secs 1 \
+  --out "$tmp_dir/bad.tsv" \
+  --ssh-bin "$mock_ssh" >"$tmp_dir/bad.stdout" 2>"$tmp_dir/bad.stderr"; then
+  echo "unsafe node name was accepted" >&2
+  exit 1
+fi
+grep -q 'node contains unsafe characters' "$tmp_dir/bad.stderr"
+
+echo "test_sample_remote_rustfs_rss: ok"