auth/credentials: don't ignore "client use kerberos" and --use-kerberos for machine...

auth/credentials: don't ignore "client use kerberos" and --use-kerberos for machine accounts

We only turn desired into off in the NT4 domain member case.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15666

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Andreas Schneider <asn@samba.org>
Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Wed Jun 19 10:17:28 UTC 2024 on atb-devel-224

(cherry picked from commit 5b40cdf6e8885c9db6c5ffa972112f3516e4130a)