gh-146139: Disable `socketpair` authentication on WASI (#146140)

Calling `connect(2)` on a non-blocking socket on WASI may leave the socket in a
"connecting" but not yet "connected" state.  In the former case, calling
`getpeername(2)` on it will fail, leading to an unhandled exception in Python.

Co-authored-by: Victor Stinner <vstinner@python.org>
Co-authored-by: Brett Cannon <brett@python.org>