failed to run Wasm_OCI_Image_Code_Source test on IPv6 first cluster

https://github.com/envoyproxy/gateway/actions/runs/11627703198/job/32383597045#step:6:44680

```console
    utils.go:53: 2024-11-01T11:39:23.868750963Z: waiting for gateway-conformance-infra/[map[app:oci-registry]] to be Running...
    wasm_oci.go:273: failed to build image: Error response from daemon: invalid reference format
```

cc @zhaohuabing 