Spin App that uses `WASI:sockets` does not work

[kate-goldenring]

TCP tests were added to the conformance tests, which caught a gap in the shim: it cannot successfully run Spin apps that use TCP.

When running this Spin app, requests fail:

curl -i -H "Host: example.com" -H "address: 127.0.0.1:38735" http://127.0.0.1:80
HTTP/1.1 500 Internal Server Error
transfer-encoding: chunked
date: Tue, 25 Jun 2024 17:05:38 GMT

I've also tried running it with the --privileged flag:

sudo ctr run --rm --privileged --env SPIN_VARIABLE_PORT=38735 --net-host --runtime io.containerd.spin.v2 ttl.sh/tcp-spin-test-app-123:48h  myapp bogus-arg

The spin up equivalent runs and passes.