fix(ci): run configs correctly with dont_clean

If we do nothing, expect will read the last run's output and produce the
same result (and sometimes failing because we killed the model too
early). So clean the run directories to make sure we run again.

Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: I4ae5bfa34b05e7006a6ab9140c20024f9ee8c445
1 file changed