gitlab-ci: Use artifacts instead of dumping logs in the Cirrus-CI jobs

gitlab-ci: Use artifacts instead of dumping logs in the Cirrus-CI jobs

The meson log files can get very big, especially if running the tests in
verbose mode. So dumping those logs to the console was a bad idea, since
gitlab truncates the output if it is getting too big. Let's publish the
logs as artifacts instead. This has the disadvantage that you have to
look up the logs on cirrus-ci.com now instead, but that's still better
than not having the important part of the log at all since it got
truncated.

Fixes: 998f334722 ("gitlab: show testlog.txt contents ...")
Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20230215142503.90660-1-thuth@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20230228190653.1602033-6-alex.bennee@linaro.org>