[#1147] node: Use public fields for shard.ExistsPrm

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

pkg/local_object_storage/engine/delete.go

@@ -83,7 +83,7 @@ func (e *StorageEngine) delete(ctx context.Context, prm DeletePrm) (DeleteRes, e
 	// 2. Otherwise, search for all objects with a particular SplitID and delete them too.
 	e.iterateOverSortedShards(prm.addr, func(_ int, sh hashedShard) (stop bool) {
 		var existsPrm shard.ExistsPrm
-		existsPrm.SetAddress(prm.addr)
+		existsPrm.Address = prm.addr
 
 		resExists, err := sh.Exists(ctx, existsPrm)
 		if err != nil {