Enable pytest live log and show warning logs on GitHub Actions CI runs (#35912)

* fix

* remove

* fix

---------

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

tests/generation/test_streamers.py

@@ -16,6 +16,7 @@
 import unittest
 from queue import Empty
 from threading import Thread
+from unittest.mock import patch
 
 import pytest
 
@@ -27,6 +28,7 @@ from transformers import (
     is_torch_available,
 )
 from transformers.testing_utils import CaptureStdout, require_torch, torch_device
+from transformers.utils.logging import _get_library_root_logger
 
 from ..test_modeling_common import ids_tensor
 
@@ -102,9 +104,12 @@ class StreamerTester(unittest.TestCase):
         model.config.eos_token_id = -1
 
         input_ids = torch.ones((1, 5), device=torch_device).long() * model.config.bos_token_id
-        with CaptureStdout() as cs:
-            streamer = TextStreamer(tokenizer, skip_special_tokens=True)
-            model.generate(input_ids, max_new_tokens=1, do_sample=False, streamer=streamer)
+
+        root = _get_library_root_logger()
+        with patch.object(root, "propagate", False):
+            with CaptureStdout() as cs:
+                streamer = TextStreamer(tokenizer, skip_special_tokens=True)
+                model.generate(input_ids, max_new_tokens=1, do_sample=False, streamer=streamer)
 
         # The prompt contains a special token, so the streamer should not print it. As such, the output text, when
         # re-tokenized, must only contain one token