ci/piglit: be explicit about what we building + noVK on arm32

What does this MR do and why?

ci/piglit: be explicit about what we building

Now CI will easily fail build, when needed dependency is not present,
instead of building without it.

Shortens build for VK container, where we use only replayer.

Signed-off-by: David Heidelberg <david.heidelberg@collabora.com>

ci/lava: enable Piglit OpenCL tests so we can test rusticl on the HW
    
The CI job will follow in separate MR.

Ref: !28731 (closed) but the GitLab didn't recovered the MR.. 😞