s4:mitkdc: Always set SDB_F_FOR_{TGS,AS}_REQ flag for DAL >= 9

s4:mitkdc: Always set SDB_F_FOR_{TGS,AS}_REQ flag for DAL >= 9

The KRB5_KDB_FLAG_REFERRAL_OK is to indicate wether a realm referral is
allowed. In AD this is always allowed. Also there is no way to pass that
indication to the SamDB layer.

Pair-Programmed-With: Andreas Schneider <asn@samba.org>

Signed-off-by: Samuel Cabrero <scabrero@samba.org>
Signed-off-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Samuel Cabrero <scabrero@samba.org>
Autobuild-Date(master): Mon Jul  4 12:22:16 UTC 2022 on sn-devel-184