Fix deprecation warnings in Python 3.12 for usage of shutil.rmtree

Author: groodt

src/pip/_internal/utils/misc.py

@@ -127,10 +127,13 @@ def get_prog() -> str:
 # Tenacity raises RetryError by default, explicitly raise the original exception
 @retry(reraise=True, stop=stop_after_delay(3), wait=wait_fixed(0.5))
 def rmtree(dir: str, ignore_errors: bool = False) -> None:
-    shutil.rmtree(dir, ignore_errors=ignore_errors, onerror=rmtree_errorhandler)
+    if sys.version_info >= (3, 12):
+        shutil.rmtree(dir, ignore_errors=ignore_errors, onexc=rmtree_errorhandler)
+    else:
+        shutil.rmtree(dir, ignore_errors=ignore_errors, onerror=rmtree_errorhandler)
 
 
-def rmtree_errorhandler(func: Callable[..., Any], path: str, exc_info: ExcInfo) -> None:
+def rmtree_errorhandler(func: Callable[..., Any], path: str, exc_info: Union[ExcInfo, BaseException]) -> None:
     """On Windows, the files in .svn are read-only, so when rmtree() tries to
     remove them, an exception is thrown.  We catch that here, remove the
     read-only attribute, and hopefully continue without problems."""