Put shutil.chown back on Windows (#7446)

See #7384 and #7443 (comment) (thanks @AlexWaygood for diagnosing).

Author: JelleZijlstra

stdlib/shutil.pyi

@@ -101,17 +101,17 @@ class _ntuple_diskusage(NamedTuple):
 
 def disk_usage(path: int | StrOrBytesPath) -> _ntuple_diskusage: ...
 
-if sys.platform != "win32":
-    # while chown can be imported on Windows it doesn't actually work
-    # see https://bugs.python.org/issue33140
-    @overload
-    def chown(path: StrOrBytesPath, user: str | int, group: None = ...) -> None: ...
-    @overload
-    def chown(path: StrOrBytesPath, user: None = ..., *, group: str | int) -> None: ...
-    @overload
-    def chown(path: StrOrBytesPath, user: None, group: str | int) -> None: ...
-    @overload
-    def chown(path: StrOrBytesPath, user: str | int, group: str | int) -> None: ...
+# While chown can be imported on Windows, it doesn't actually work;
+# see https://bugs.python.org/issue33140. We keep it here because it's
+# in __all__.
+@overload
+def chown(path: StrOrBytesPath, user: str | int, group: None = ...) -> None: ...
+@overload
+def chown(path: StrOrBytesPath, user: None = ..., *, group: str | int) -> None: ...
+@overload
+def chown(path: StrOrBytesPath, user: None, group: str | int) -> None: ...
+@overload
+def chown(path: StrOrBytesPath, user: str | int, group: str | int) -> None: ...
 
 if sys.version_info >= (3, 8):
     @overload

tests/stubtest_allowlists/win32.txt

@@ -75,6 +75,3 @@ ssl.SSLSocket.recvmsg
 ssl.SSLSocket.recvmsg_into
 ssl.SSLSocket.sendmsg
 winreg.HKEYType.handle
-
-# exist but do not work on Windows
-shutil.chown