[#959] node: Set mode to shard's components when open it

Avoid opening database for `metabase` and `cache` in `Degraded` mode.

Signed-off-by: Anton Nikiforov <an.nikiforov@yadro.com>

pkg/local_object_storage/blobstor/mode.go

@@ -22,7 +22,7 @@ func (b *BlobStor) SetMode(m mode.Mode) error {
 
 	err := b.Close()
 	if err == nil {
-		if err = b.Open(context.TODO(), m.ReadOnly()); err == nil {
+		if err = b.openBlobStor(context.TODO(), m); err == nil {
 			err = b.Init()
 		}
 	}