UPSTREAM: erofs-utils: fsck: convert to use erofs_iterate_dir() am: 3fe921e9a2 am: 3754f5a045

Original change: https://android-review.googlesource.com/c/platform/external/erofs-utils/+/1966840

Change-Id: I4f7788106f3ff217e3b2ec8b3dc736e9315e2478