Use feature flags in OperatorPrivilegesIT (elastic#117491) (elastic#117631)

# Backport

This will backport the following commits from `main` to `8.16`:
 - [Use feature flags in OperatorPrivilegesIT (elastic#117491)](elastic#117491)

Closes: elastic#117683

Author: n1v0lg

x-pack/plugin/security/qa/operator-privileges-tests/src/javaRestTest/java/org/elasticsearch/xpack/security/operator/Constants.java

@@ -7,6 +7,8 @@
 
 package org.elasticsearch.xpack.security.operator;
 
+import org.elasticsearch.cluster.metadata.DataStream;
+
 import java.util.Objects;
 import java.util.Set;
 import java.util.stream.Collectors;
@@ -503,9 +505,9 @@ public class Constants {
         "indices:admin/data_stream/lifecycle/get",
         "indices:admin/data_stream/lifecycle/put",
         "indices:admin/data_stream/lifecycle/explain",
-        "indices:admin/data_stream/options/delete",
-        "indices:admin/data_stream/options/get",
-        "indices:admin/data_stream/options/put",
+        DataStream.isFailureStoreFeatureFlagEnabled() ? "indices:admin/data_stream/options/delete" : null,
+        DataStream.isFailureStoreFeatureFlagEnabled() ? "indices:admin/data_stream/options/get" : null,
+        DataStream.isFailureStoreFeatureFlagEnabled() ? "indices:admin/data_stream/options/put" : null,
         "indices:admin/delete",
         "indices:admin/flush",
         "indices:admin/flush[s]",