Use mapped action filter for api filtering

The MappedActionFilter was added to make filtering more efficient, but
the api filtering action filter was not yet using it. This commit
adjusts this shared action filter to implement MappedActionFilter.

x-pack/plugin/core/src/main/java/org/elasticsearch/xpack/core/api/filtering/ApiFilteringActionFilter.java

@@ -10,13 +10,13 @@
 import org.elasticsearch.action.ActionListener;
 import org.elasticsearch.action.ActionRequest;
 import org.elasticsearch.action.ActionResponse;
-import org.elasticsearch.action.support.ActionFilter;
 import org.elasticsearch.action.support.ActionFilterChain;
+import org.elasticsearch.action.support.MappedActionFilter;
 import org.elasticsearch.common.util.concurrent.ThreadContext;
 import org.elasticsearch.tasks.Task;
 import org.elasticsearch.xpack.core.security.authc.AuthenticationField;
 
-public abstract class ApiFilteringActionFilter<Res extends ActionResponse> implements ActionFilter {
+public abstract class ApiFilteringActionFilter<Res extends ActionResponse> implements MappedActionFilter {
 
     private final ThreadContext threadContext;
     private final String actionName;
@@ -36,6 +36,11 @@ public int order() {
         return 0;
     }
 
+    @Override
+    public final String actionName() {
+        return actionName;
+    }
+
     @Override
     public <Request extends ActionRequest, Response extends ActionResponse> void apply(
         Task task,