gitlab: turn off verbose logging for make check on custom runners

gitlab: turn off verbose logging for make check on custom runners

The verbosity adds a lot of unnecessary output to the CI logs which
end up getting truncated anyway. We can always extract information
from the meson test logs on a failure and for the custom runners its
generally easier to re-create failures anyway.

Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Reviewed-by: Thomas Huth <thuth@redhat.com>
Message-Id: <20221221090411.1995037-3-alex.bennee@linaro.org>