Currently the lava artefacts are built separately than the Apertis
standard images. The image testing profiles can't be used because
the lava artefacts may not be built already when the image tests
are submitted.
Add specific profiles for the lava artefacts tests.
Create one lava profile per arch which is based on the
apertis-minimal-<arch>-<board>

Signed-off-by: Frédéric Dalleau <frederic.dalleau@collabora.com>