vfs_gpfs: Ignore pathref fds for gpfs:recalls check

vfs_gpfs: Ignore pathref fds for gpfs:recalls check

Setting gpfs:recalls=no should prevent data access to offline files.
Since Samba 4.14, the VFS openat function is also called with O_PATH to
get a reference to the path. These accesses should not be blocked,
otherwise this would prevent offline files from being included in
directory listings.

Fix this by skipping the check for pathref fds.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15055

Signed-off-by: Christof Schmitt <cs@samba.org>
Reviewed-by: Ralph Boehme <slow@samba.org>
Autobuild-User(master): Ralph Böhme <slow@samba.org>
Autobuild-Date(master): Thu Apr 28 07:59:47 UTC 2022 on sn-devel-184