fs: consistently return symlink type from readdir

Use 'lstat' to determine type of directory entry.
This is more consistent with the type returned from the readdir binding.
Also use 'path.join' over 'path.resolve' because 'name' is not absolute.

PR-URL: https://github.com/nodejs/node/pull/22808


Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Bryan English <bryan@bryanenglish.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>