sparse: use `update_file` instead of `normallookup` in refreshwdir

This is the newer, more semantic API.

Differential Revision: https://phab.mercurial-scm.org/D11179

mercurial/sparse.py

@@ -572,7 +572,9 b' def refreshwdir(repo, origstatus, origsp'
 
     for file in lookup:
         # File exists on disk, and we're bringing it back in an unknown state.
-        dirstate.normallookup(file)
+        dirstate.update_file(
+            file, p1_tracked=True, wc_tracked=True, possibly_dirty=True
+        )
 
     return added, dropped, lookup