Port skip llm gguf macos test (#2328) to 25.2 (#2364)

Port skip llm gguf macos test
#2328 in 2025/2
branch.

Author: Xiake Sun

tests/python_tests/test_llm_pipeline.py

@@ -4,6 +4,7 @@
 
 import pytest
 import torch
+import sys
 import os
 import json
 import numpy as np
@@ -813,6 +814,8 @@ def py_streamer(py_str: str):
 @pytest.mark.parametrize("model_ids", get_gguf_model_list())
 @pytest.mark.precommit
 def test_pipelines_with_gguf_generate(pipeline_type, model_ids):
+    if sys.platform == 'darwin':
+        pytest.skip(reason="168882: Sporadic segmentation fault failure on MacOS.")
     gguf_model_id = model_ids["gguf_model_id"]
     gguf_filename = model_ids["gguf_filename"]
     prompt = 'Why is the Sun yellow?'
@@ -848,6 +851,8 @@ def test_pipelines_with_gguf_generate(pipeline_type, model_ids):
 @pytest.mark.parametrize("model_ids", get_gguf_model_list())
 @pytest.mark.precommit
 def test_full_gguf_pipeline(pipeline_type, model_ids):
+    if sys.platform == 'darwin':
+        pytest.skip(reason="168882: Sporadic segmentation fault failure on MacOS.")
     gguf_model_id = model_ids["gguf_model_id"]
     gguf_filename = model_ids["gguf_filename"]
     prompt = 'Why is the Sun yellow?'