socket: add SO_INCOMING_CPU for 3.11 (#7801)

python/cpython#31237

stdlib/_socket.pyi

@@ -256,6 +256,8 @@ SO_SNDLOWAT: int
 SO_SNDTIMEO: int
 SO_TYPE: int
 SO_USELOOPBACK: int
+if sys.platform == "linux" and sys.version_info >= (3, 11):
+    SO_INCOMING_CPU: int
 TCP_CORK: int
 TCP_DEFER_ACCEPT: int
 TCP_FASTOPEN: int

stdlib/socket.pyi

@@ -366,6 +366,8 @@ if sys.platform == "linux" and sys.version_info >= (3, 9):
     )
 if sys.platform == "linux" and sys.version_info >= (3, 10):
     from _socket import IPPROTO_MPTCP as IPPROTO_MPTCP
+if sys.platform == "linux" and sys.version_info >= (3, 11):
+    from _socket import SO_INCOMING_CPU as SO_INCOMING_CPU
 if sys.platform == "win32":
     from _socket import (
         RCVALL_IPLEVEL as RCVALL_IPLEVEL,