gh-93852: Add test.support.create_unix_domain_name() (#93914)

test_asyncio, test_logging, test_socket and test_socketserver now
create AF_UNIX domains in the current directory to no longer fail
with OSError("AF_UNIX path too long") if the temporary directory (the
TMPDIR environment variable) is too long.

Modify the following tests to use create_unix_domain_name():

* test_asyncio
* test_logging
* test_socket
* test_socketserver

test_asyncio.utils: remove unused time import.

Lib/test/test_asyncio/utils.py

@@ -11,9 +11,7 @@ import selectors
 import socket
 import socketserver
 import sys
-import tempfile
 import threading
-import time
 import unittest
 import weakref
 
@@ -34,6 +32,7 @@ from asyncio import futures
 from asyncio import tasks
 from asyncio.log import logger
 from test import support
+from test.support import socket_helper
 from test.support import threading_helper
 
 
@@ -251,8 +250,7 @@ if hasattr(socket, 'AF_UNIX'):
 
 
     def gen_unix_socket_path():
-        with tempfile.NamedTemporaryFile() as file:
-            return file.name
+        return socket_helper.create_unix_domain_name()
 
 
     @contextlib.contextmanager