path_open with an empty path should fail

[yagehu]

Describe the bug

Calling path_open on an empty path fails on host Linux as well as other runtimes (Wasmtime, Node, WAMR, WasmEdge, Wasmer). But Wazero succeeds and returns a fd.

As a reference, POSIX specifies that:

A null pathname shall not be successfully resolved.

A rust example that uses wasi crate 0.11.

fn main() {
    unsafe {
        let fd = wasi::path_open(
            3,
            0,
            "",
            0,
            wasi::RIGHTS_FD_READ | wasi::RIGHTS_FD_WRITE | wasi::RIGHTS_FD_SEEK,
            0,
            0,
        )
        .unwrap();

        eprintln!("fd: {fd}");
    }
}

Expected behavior
Wazero should error and not return a fd.

Environment (please complete the relevant information):

• Go version: go1.21.1 darwin/amd64
• wazero Version: d4a4903
• Host architecture: amd64
• Runtime mode: [e.g. interpreter or compiler]