Update errno module for 3.14 (#14123)

Author: sobolevn

stdlib/@tests/stubtest_allowlists/linux-py314.txt

@@ -10,5 +10,4 @@ asyncio.unix_events._DefaultEventLoopPolicy
 ctypes.c_double_complex._type_
 ctypes.c_float_complex._type_
 ctypes.c_longdouble_complex._type_
-errno.EHWPOISON
 select.EPOLLWAKEUP

stdlib/errno.pyi

@@ -170,6 +170,9 @@ if sys.platform != "win32" and sys.platform != "darwin":
     ENOMEDIUM: int
     ERFKILL: int
 
+    if sys.version_info >= (3, 14):
+        EHWPOISON: int
+
 if sys.platform == "win32":
     # All of these are undocumented
     WSABASEERR: int