Add os.EX_OK on Windows, Python 3.11+ (#10748)

Author: aminalaee

stdlib/os/__init__.pyi

@@ -252,12 +252,14 @@ environ: _Environ[str]
 if sys.platform != "win32":
     environb: _Environ[bytes]
 
+if sys.version_info >= (3, 11) or sys.platform != "win32":
+    EX_OK: int
+
 if sys.platform != "win32":
     confstr_names: dict[str, int]
     pathconf_names: dict[str, int]
     sysconf_names: dict[str, int]
 
-    EX_OK: int
     EX_USAGE: int
     EX_DATAERR: int
     EX_NOINPUT: int

tests/stubtest_allowlists/win32-py311.txt

@@ -2,7 +2,6 @@
 asyncio.IocpProactor.recvfrom_into
 asyncio.windows_events.IocpProactor.recvfrom_into
 msvcrt.GetErrorMode
-os.EX_OK
 
 # pathlib methods that exist on Windows, but always raise NotImplementedError,
 # so are omitted from the stub

tests/stubtest_allowlists/win32-py312.txt

@@ -5,7 +5,6 @@ asyncio.windows_events.IocpProactor.finish_socket_func
 asyncio.windows_events.IocpProactor.recvfrom_into
 msvcrt.GetErrorMode
 ntpath.isdir
-os.EX_OK
 os.get_blocking
 os.listdrives
 os.listmounts