[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>

tests/models/multimodal/generation/test_phi4mm.py

@@ -1,12 +1,12 @@
 # SPDX-License-Identifier: Apache-2.0
 
 import os
-import re
 from collections.abc import Sequence
 from typing import Optional
 
 import librosa
 import pytest
+import regex as re
 from huggingface_hub import snapshot_download
 from transformers import AutoTokenizer
 

tests/models/multimodal/generation/vlm_utils/model_utils.py

@@ -3,11 +3,11 @@
 for manipulating the input / output of HF & vLLM test runners, which are
 typically specific to a small subset of models.
 """
-import re
 import types
 from pathlib import PosixPath
 from typing import Optional, Union
 
+import regex as re
 import torch
 from PIL.Image import Image
 from transformers import (AutoConfig, AutoTokenizer, BatchFeature,