data: split node and snapshot code from restic package

internal/fs/node_linux.go

@@ -1,12 +1,12 @@
 package fs
 
 import (
-	"github.com/restic/restic/internal/restic"
+	"github.com/restic/restic/internal/data"
 	"golang.org/x/sys/unix"
 )
 
 // utimesNano is like syscall.UtimesNano, except that it does not follow symlinks.
-func utimesNano(path string, atime, mtime int64, _ restic.NodeType) error {
+func utimesNano(path string, atime, mtime int64, _ data.NodeType) error {
 	times := []unix.Timespec{
 		unix.NsecToTimespec(atime),
 		unix.NsecToTimespec(mtime),