gitlab-ci: Use native aarch64 runner for ARM build jobs

This allows running the regression tests.

One downside is that we can't easily build the Vulkan overlay layer,
because only x86 binaries of the glslang validator are available. If
that's important, we could either use those binaries via qemu, or build
it from source.

v2:
* Add :amd64 suffix to existing debian-9/10 job names (Eric Engestrom)

Acked-by: Eric Engestrom <eric.engestrom@intel.com> # v1
3 files changed