auth: Cleanup exit code paths in kerberos_decode_pac().

auth: Cleanup exit code paths in kerberos_decode_pac().

One more memory leak missed and now fixed. tmp_ctx
must be freed once the pac data is talloc_move'd.

BUG: https://bugzilla.samba.org/show_bug.cgi?id=15782

Signed-off-by: Jeremy Allison <jra@samba.org>
Reviewed-by: Jennifer Sutton <jennifersutton@catalyst.net.nz>
Reviewed-by: Christian Ambach <ambi@samba.org>
Reviewed-by: Guenther Deschner <gd@samba.org>
Autobuild-User(master): Günther Deschner <gd@samba.org>
Autobuild-Date(master): Fri Jan 17 12:01:47 UTC 2025 on atb-devel-224

(cherry picked from commit f9eb0b248da0689c82656f3e482161c45749afb6)