s3:winbindd: make use of reset_cm_connection_on_error() for winbindd_lookup_{names...

s3:winbindd: make use of reset_cm_connection_on_error() for winbindd_lookup_{names,sids}()

Note this is more than a simple invalidate_cm_connection() as it may set
domain->conn.netlogon_force_reauth = true.

This is not strictly needed as the callers call
reset_cm_connection_on_error() via reconnect_need_retry().
But it might avoid one roundtrip.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15413

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Reviewed-by: Volker Lendecke <vl@samba.org>