Change remote store restore cluster state priority to URGENT (#16281)

Signed-off-by: Sachin Kale <sachinpkale@gmail.com>
(cherry picked from commit d6ea8eb)
Signed-off-by: github-actions[bot] <github-actions[bot]@users.noreply.github.com>

server/src/main/java/org/opensearch/index/recovery/RemoteStoreRestoreService.java

@@ -27,6 +27,7 @@
 import org.opensearch.cluster.routing.allocation.AllocationService;
 import org.opensearch.cluster.service.ClusterService;
 import org.opensearch.common.Nullable;
+import org.opensearch.common.Priority;
 import org.opensearch.common.UUIDs;
 import org.opensearch.common.collect.Tuple;
 import org.opensearch.common.settings.Settings;
@@ -95,7 +96,7 @@ public RemoteStoreRestoreService(
      * @param listener restore listener
      */
     public void restore(RestoreRemoteStoreRequest request, final ActionListener<RestoreService.RestoreCompletionResponse> listener) {
-        clusterService.submitStateUpdateTask("restore[remote_store]", new ClusterStateUpdateTask() {
+        clusterService.submitStateUpdateTask("restore[remote_store]", new ClusterStateUpdateTask(Priority.URGENT) {
             String restoreUUID;
             RestoreInfo restoreInfo = null;