Introduce per-component CI_BUILD_COMPONENTS_* variables to allow
more flexible composition of CI_BUILD_COMPONENTS, and add these to
every container job by listing them in .container.
Also rework the -arm64 and -x86_64 definitions, which were still
based on the old kernel+rootfs layout. Split them into -gl and -vk,
but keep -arm32, which builds fewer components.
Signed-off-by: Valentine Burley <valentine.burley@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34813>
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