tests: fork default automake test-driver

tests: fork default automake test-driver

For some of the test we don't like the default log behavior
and there seems no easy way to change that except to fork
the driver. The license seems unproblematic since we're
GPL anyway.

v2:
 - Do not use forked-test-driver for UTs. Default behavior
   is fine for those.

Change-Id: I67d461afbcc9c06b1fc5ab4477141d7b8bd9ba8e
Signed-off-by: Frank Lichtenheld <frank@lichtenheld.com>
Acked-by: Arne Schwabe <arne-openvpn@rfc2549.org>
Message-Id: <20240125110036.16070-1-frank@lichtenheld.com>
URL: https://www.mail-archive.com/openvpn-devel@lists.sourceforge.net/msg28132.html
Signed-off-by: Gert Doering <gert@greenie.muc.de>