Add annotation for watcher deprecated setting (elastic#124278)

Author: samxbr

x-pack/plugin/watcher/src/main/java/org/elasticsearch/xpack/watcher/Watcher.java

@@ -38,6 +38,7 @@
 import org.elasticsearch.common.util.concurrent.EsExecutors;
 import org.elasticsearch.core.IOUtils;
 import org.elasticsearch.core.TimeValue;
+import org.elasticsearch.core.UpdateForV10;
 import org.elasticsearch.env.Environment;
 import org.elasticsearch.features.FeatureService;
 import org.elasticsearch.features.NodeFeature;
@@ -240,6 +241,7 @@ public class Watcher extends Plugin implements SystemIndexPlugin, ScriptPlugin,
         NodeScope
     );
     private static final Setting<Integer> SETTING_BULK_ACTIONS = Setting.intSetting("xpack.watcher.bulk.actions", 1, 1, 10000, NodeScope);
+    @UpdateForV10(owner = UpdateForV10.Owner.DATA_MANAGEMENT)
     @Deprecated(forRemoval = true) // This setting is no longer used
     private static final Setting<Integer> SETTING_BULK_CONCURRENT_REQUESTS = Setting.intSetting(
         "xpack.watcher.bulk.concurrent_requests",