venv: add logger (#9508)

Not particularly useful but unreleased stubtest will require this:
https://github.com/python/typeshed/actions/runs/3898630022/jobs/6657546205

stdlib/venv/__init__.pyi

@@ -1,8 +1,11 @@
+import logging
 import sys
 from _typeshed import StrOrBytesPath
 from collections.abc import Sequence
 from types import SimpleNamespace
 
+logger: logging.Logger
+
 if sys.version_info >= (3, 9):
     CORE_VENV_DEPS: tuple[str, ...]