bench: add count-changing edit family

Author: yifanxuaaa

benchmark/fs-bench-pro/run-edit-count-changing.sh

@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+set -euo pipefail
+export LAYERFS_EDIT_FAMILY=count-changing
+exec "$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd -P)/run-edit-same-count.sh" "$@"