GeezerVison

Fixes #161657.

On an AF_VSOCK socket, setsockopt() rejects a packed SO_LINGER value and getsockopt() rejects the buffer size needed to read it. Limit VSOCK's 64-bit integer handling to the AF_VSOCK option level so SOL_SOCKET options use their usual types.

The regression uses a Unix socket descriptor so it can run without a VSOCK device. It reproduces the failure on main. I tested locally on a Linux arm64 debug build. The full test_socket module passed, and I verified the SO_LINGER round trip on a real VSOCK socket.

I used AI assistance for this change.

• Issue: AF_VSOCK sockets reject buffered SOL_SOCKET options #161657