[#1337] blobovniczatree: Add .rebuild temp files

This allows to reduce open/close DBs to check incompleted rebuilds.

Signed-off-by: Dmitrii Stepanov <d.stepanov@yadro.com>

pkg/local_object_storage/blobstor/blobovniczatree/blobovnicza.go

@@ -135,7 +135,7 @@ func getBlobovniczaMaxIndex(directory string) (bool, uint64, error) {
 	var hasDBs bool
 	var maxIdx uint64
 	for _, e := range entries {
-		if e.IsDir() {
+		if e.IsDir() || strings.HasSuffix(e.Name(), rebuildSuffix) {
 			continue
 		}
 		hasDBs = true