Include folders into size cost (#18158)

- Include folders for the disk consumption size, they should be included
as they are also saved on the disk :)
- Have a more accurate picture of the size of a repo.
- Mostly they are the size of the file system's block size. E.g. 4Kb on
Linux.

modules/util/path.go

@@ -24,9 +24,9 @@ func EnsureAbsolutePath(path, absoluteBase string) string {
  return filepath.Join(absoluteBase, path)
 }
 
-const notRegularFileMode os.FileMode = os.ModeDir | os.ModeSymlink | os.ModeNamedPipe | os.ModeSocket | os.ModeDevice | os.ModeCharDevice | os.ModeIrregular
+const notRegularFileMode os.FileMode = os.ModeSymlink | os.ModeNamedPipe | os.ModeSocket | os.ModeDevice | os.ModeCharDevice | os.ModeIrregular
 
-// GetDirectorySize returns the dumb disk consumption for a given path
+// GetDirectorySize returns the disk consumption for a given path
 func GetDirectorySize(path string) (int64, error) {
  var size int64
  err := filepath.Walk(path, func(_ string, info os.FileInfo, err error) error {