oauth: Remove timeout from t/002_client when not needed

oauth: Remove timeout from t/002_client when not needed

The connect_timeout=1 setting for the --hang-forever test was left in
place and used by later tests, causing unexpected timeouts on slower
buildfarm animals. Remove it when no longer needed.

Per buildfarm member skink, reported by Andres on Discord.

Author: Jacob Champion <jacob.champion@enterprisedb.com>
Reported-by: Andres Freund <andres@anarazel.de>