Add config fragment, build script, and CI integration for building
Mellanox MLX5/InfiniBand kernel modules as a standalone disk image.
The orchestrator script (build-kernel-modules-images.sh) builds the
kernel with extra module config fragments, runs modules_install,
filters modules by subsystem into per-set staging trees, and
packages each into its own disk image using build-modules-volume.sh.
Since these modules are built within the Kata CI using the same
KBUILD_SIGN_PIN, they are signed and loadable on the official
released Kata kernel.
Signed-off-by: Fabiano Fidêncio <ffidencio@nvidia.com>
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