Linux 7.0: also set setlease handler on directories (#18331)

It turns out the kernel can also take directory leases, most notably in
the NFS server. Without a setlease handler on the directory file ops,
attempts to open a directory over NFS can fail with EINVAL.

Adding a directory setlease handler was missed in 168023b603. This fixes
that, allowing directories to be properly accessed over NFS.

Sponsored-by: TrueNAS
Reported-by: Satadru Pramanik <satadru@gmail.com>

Signed-off-by: Rob Norris <rob.norris@truenas.com>
Reviewed-by: Alexander Motin <alexander.motin@TrueNAS.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>

module/os/linux/zfs/zpl_file.c

@@ -1268,6 +1268,7 @@ const struct file_operations zpl_dir_file_operations = {
 	.read		= generic_read_dir,
 	.iterate_shared	= zpl_iterate,
 	.fsync		= zpl_fsync,
+	.setlease	= generic_setlease,
 	.unlocked_ioctl = zpl_ioctl,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl   = zpl_compat_ioctl,