[Bugfix] Migrate to REGEX Library to prevent catastrophic backtracking (#18454)

Signed-off-by: Crucifixion-Fxl <xmufxl@gmail.com>
Co-authored-by: Crucifixion-Fxl <xmufxl@gmail.com>

setup.py

@@ -5,12 +5,12 @@ import importlib.util
 import json
 import logging
 import os
-import re
 import subprocess
 import sys
 from pathlib import Path
 from shutil import which
 
+import regex as re
 import torch
 from packaging.version import Version, parse
 from setuptools import Extension, setup
@@ -389,7 +389,6 @@ class repackage_wheel(build_ext):
             # vllm_flash_attn python code:
             # Regex from
             #  `glob.translate('vllm/vllm_flash_attn/**/*.py', recursive=True)`
-            import re
             compiled_regex = re.compile(
                 r"vllm/vllm_flash_attn/(?:[^/.][^/]*/)*(?!\.)[^/]*\.py")
             file_members += list(