s3-net: no secrets access required when processing a ODJ provisioning

s3-net: no secrets access required when processing a ODJ provisioning

It should be possible to call "net offlinejoin provision" as non-root,
no access to secrets.tdb required in that case.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15414

Guenther

Signed-off-by: Guenther Deschner <gd@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Günther Deschner <gd@samba.org>
Autobuild-Date(master): Wed Jul  5 09:23:22 UTC 2023 on atb-devel-224