Add CTYPES_MAX_ARGCOUNT to _ctypes (#8601)

stdlib/_ctypes.pyi

@@ -2,6 +2,9 @@ import sys
 from ctypes import _CArgObject, _PointerLike
 from typing_extensions import TypeAlias
 
+if sys.version_info >= (3, 11):
+    CTYPES_MAX_ARGCOUNT: int
+
 if sys.platform == "win32":
     # Description, Source, HelpFile, HelpContext, scode
     _COMError_Details: TypeAlias = tuple[str | None, str | None, str | None, int | None, int | None]

tests/stubtest_allowlists/py311.txt

@@ -12,7 +12,6 @@ _collections_abc.MappingView.__class_getitem__
 _collections_abc.ValuesView.__reversed__
 _csv.Reader
 _csv.Writer
-_ctypes.CTYPES_MAX_ARGCOUNT
 _operator.attrgetter.__vectorcalloffset__
 _operator.itemgetter.__vectorcalloffset__
 argparse._MutuallyExclusiveGroup.add_mutually_exclusive_group