Add FeatureFlag to YAML tests

Author: carlosdelest

x-pack/qa/core-rest-tests-with-security/src/yamlRestTest/java/org/elasticsearch/xpack/security/CoreWithSecurityClientYamlTestSuiteIT.java

@@ -52,6 +52,7 @@ public class CoreWithSecurityClientYamlTestSuiteIT extends ESClientYamlSuiteTest
         .feature(FeatureFlag.SUB_OBJECTS_AUTO_ENABLED)
         .feature(FeatureFlag.DOC_VALUES_SKIPPER)
         .feature(FeatureFlag.USE_LUCENE101_POSTINGS_FORMAT)
+        .feature(FeatureFlag.IVF_FORMAT)
         .build();
 
     public CoreWithSecurityClientYamlTestSuiteIT(@Name("yaml") ClientYamlTestCandidate testCandidate) {