Start to differentiate between the different types of LAVA log message;
the only visible change right now is that we make warnings and errors
bold and red to match bare-metal, but it comes in useful later as we
will use the results markers to watch us step through the different
stages of job execution.
Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15938>
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