gh-128770: raise warnings as errors in test suite - except for test_socket which still logs warnings, and internal test warnings that are now logged (#128973)

Co-authored-by: Bénédikt Tran <10796600+picnixz@users.noreply.github.com>

Lib/test/test_hashlib.py

@@ -10,6 +10,7 @@ import hashlib
 import importlib
 import io
 import itertools
+import logging
 import os
 import sys
 import sysconfig
@@ -113,7 +114,11 @@ class HashLibTestCase(unittest.TestCase):
             return importlib.import_module(module_name)
         except ModuleNotFoundError as error:
             if self._warn_on_extension_import and module_name in builtin_hashes:
-                warnings.warn(f'Did a C extension fail to compile? {error}')
+                logging.getLogger(__name__).warning(
+                    'Did a C extension fail to compile? %s',
+                    error,
+                    exc_info=error,
+                )
         return None
 
     def __init__(self, *args, **kwargs):