Add Trace Logging to File Restore (#62755) (#62761)

Requested by the performance team and generally potentially useful
to log each file at `TRACE` like we do for snapshot create.

server/src/main/java/org/elasticsearch/repositories/blobstore/BlobStoreRepository.java

@@ -2104,6 +2104,7 @@ public abstract class BlobStoreRepository extends AbstractLifecycleComponent imp
 
                 private void restoreFile(BlobStoreIndexShardSnapshot.FileInfo fileInfo, Store store) throws IOException {
                     ensureNotClosing(store);
+                    logger.trace(() -> new ParameterizedMessage("[{}] restoring [{}] to [{}]", metadata.name(), fileInfo, store));
                     boolean success = false;
                     try (IndexOutput indexOutput =
                              store.createVerifyingOutput(fileInfo.physicalName(), fileInfo.metadata(), IOContext.DEFAULT)) {