restic: extract Node filesystem code to fs package

internal/fs/node_darwin.go

@@ -0,0 +1,11 @@
+package fs
+
+import "syscall"
+
+func nodeRestoreSymlinkTimestamps(path string, utimes [2]syscall.Timespec) error {
+	return nil
+}
+
+func (s statT) atim() syscall.Timespec { return s.Atimespec }
+func (s statT) mtim() syscall.Timespec { return s.Mtimespec }
+func (s statT) ctim() syscall.Timespec { return s.Ctimespec }