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
}
                }""".formatted(
                loginJsonResponse.getAsString("id"),
                loginJsonResponse.getAsString("email"),
                loginJsonResponse.getAsString("name")
            );
            configureJsonRequest(consentFetchHttpPut, consentFetchJson);
            JSONObject consentFetchResponse = execute(httpClient, consentFetchHttpPut, context, response -> {
                assertHttpOk(response.getStatusLine());
                return parseJsonResponse(response);
            });
            if (consentFetchResponse.getAsString("type").equals("consent")) {
                
                HttpPut consentHttpPut = new HttpPut(
                    C2ID_LOGIN_API + "updateAuthRequest" + "/" + sid + "?cacheBuster=" + randomAlphaOfLength(8)
                );
                String consentJson = """
                    {"claims":["name", "email"],"scope":["openid"]}""";
                configureJsonRequest(consentHttpPut, consentJson);
                JSONObject jsonConsentResponse = execute(httpClient, consentHttpPut, context, response -> {
                    assertHttpOk(response.getStatusLine());
                    return parseJsonResponse(response);
                });
                assertThat(jsonConsentResponse.getAsString("type"), equalTo("response"));
                JSONObject parameters = (JSONObject) jsonConsentResponse.get("parameters");
                return parameters.getAsString("uri");
            } else if (consentFetchResponse.getAsString("type").equals("response")) {
                JSONObject parameters = (JSONObject) consentFetchResponse.get("parameters");
                return parameters.getAsString("uri");
            } else {