s3/modules: Fix DFS links when widelinks = yes

s3/modules: Fix DFS links when widelinks = yes

In openat(), even if we fail to open the file,
propagate stat if and only if the object is a link in
a DFS share. This allows calling code to further process
the link.

Also remove knownfail

Pair-Programmed-With: Jeremy Alison <jra@samba.org>

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15435

Signed-off-by: Noel Power <noel.power@suse.com>
Reviewed-by: Jeremy Allison <jra@samba.org>
Autobuild-User(master): Jeremy Allison <jra@samba.org>
Autobuild-Date(master): Sat Jul 29 00:43:52 UTC 2023 on atb-devel-224