Update genericpath to 3.12 (#10623)

stdlib/genericpath.pyi

@@ -1,5 +1,6 @@
 import os
-from _typeshed import BytesPath, FileDescriptorOrPath, StrPath, SupportsRichComparisonT
+import sys
+from _typeshed import BytesPath, FileDescriptorOrPath, StrOrBytesPath, StrPath, SupportsRichComparisonT
 from collections.abc import Sequence
 from typing import overload
 from typing_extensions import Literal, LiteralString
@@ -17,6 +18,8 @@ __all__ = [
     "sameopenfile",
     "samestat",
 ]
+if sys.version_info >= (3, 12):
+    __all__ += ["islink"]
 
 # All overloads can return empty string. Ideally, Literal[""] would be a valid
 # Iterable[T], so that list[T] | Literal[""] could be used as a return
@@ -36,6 +39,9 @@ def getsize(filename: FileDescriptorOrPath) -> int: ...
 def isfile(path: FileDescriptorOrPath) -> bool: ...
 def isdir(s: FileDescriptorOrPath) -> bool: ...
 
+if sys.version_info >= (3, 12):
+    def islink(path: StrOrBytesPath) -> bool: ...
+
 # These return float if os.stat_float_times() == True,
 # but int is a subclass of float.
 def getatime(filename: FileDescriptorOrPath) -> float: ...

tests/stubtest_allowlists/py312.txt

@@ -12,8 +12,6 @@ enum.Enum.__signature__
 enum.EnumMeta.__call__
 enum.EnumType.__call__
 enum.property.member
-genericpath.__all__
-genericpath.islink
 gzip.GzipFile.filename
 http.client.HTTPConnection.get_proxy_response_headers
 imaplib.IMAP4_SSL.__init__