It seems the `c2id/c2id-server` docker image has dissappeared from DockerHub so our idp-fixture that depends on it can no longer start. This is currently only required by our `oidc-op-tests` project so for now I've disabled these tests. We'll need to find an alternative fixture here. I tried simply replacing it with the `c2id-server-demo` image but it wasn't a direct replacement.

https://gradle-enterprise.elastic.co/s/p4vwhzkudvutw
x-pack/qa/oidc-op-tests/src/javaRestTest/java/org/elasticsearch/xpack/security/authc/oidc/C2IdOpTestCase.java
import org.apache.http.protocol.HttpContext;
import org.apache.http.util.EntityUtils;
import org.elasticsearch.client.Request;
import org.elasticsearch.client.RequestOptions;
import org.elasticsearch.client.RestClient;
import org.elasticsearch.common.settings.SecureString;
import org.elasticsearch.common.settings.Settings;
import org.elasticsearch.common.util.concurrent.ThreadContext;
import org.elasticsearch.core.CheckedFunction;
import org.elasticsearch.core.PathUtils;
import org.elasticsearch.core.TimeValue;
import org.elasticsearch.test.rest.ESRestTestCase;
import org.elasticsearch.xpack.core.common.socket.SocketAccess;
import org.hamcrest.Matchers;
import org.junit.BeforeClass;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URI;
import java.net.URL;
import java.nio.file.Path;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import static org.hamcrest.Matchers.equalTo;
public abstract class C2IdOpTestCase extends ESRestTestCase {
    protected static final String TEST_SUBJECT_ID = "alice";
    
    private static final String C2OP_PORT = getEphemeralTcpPortFromProperty("oidc-provider", "8080");
    private static final String C2ID_LOGIN_API = "http://127.0.0.1:" + C2OP_PORT + "/c2id-login/api/";
    private static final String C2ID_REGISTRATION_URL = "http://127.0.0.1:" + C2OP_PORT + "/c2id/clients";