Use InfoStream.NO_OUTPUT in PersistedClusterStateService

We can save some allocations and speedup tests some more by using
`InfoStream.NO_OUTPUT` instead of the default `NullInfoStream` that does
not log but causes signals enabled to its users and thus causes
large strings to needlessly be setup.

server/src/main/java/org/elasticsearch/gateway/PersistedClusterStateService.java

@@ -39,6 +39,7 @@
 import org.apache.lucene.store.NIOFSDirectory;
 import org.apache.lucene.util.Bits;
 import org.apache.lucene.util.BytesRef;
+import org.apache.lucene.util.InfoStream;
 import org.apache.lucene.util.SetOnce;
 import org.elasticsearch.Version;
 import org.elasticsearch.cluster.ClusterState;
@@ -261,6 +262,7 @@ CheckedBiConsumer<Path, DirectoryReader, IOException> getAssertOnCommit() {
 
  private static IndexWriter createIndexWriter(Directory directory, boolean openExisting) throws IOException {
  final IndexWriterConfig indexWriterConfig = new IndexWriterConfig(new KeywordAnalyzer());
+ indexWriterConfig.setInfoStream(InfoStream.NO_OUTPUT);
  // start empty since we re-write the whole cluster state to ensure it is all using the same format version
  indexWriterConfig.setOpenMode(openExisting ? IndexWriterConfig.OpenMode.APPEND : IndexWriterConfig.OpenMode.CREATE);
  // only commit when specifically instructed, we must not write any intermediate states