Add the nvrc static-build target and make the NVIDIA rootfs targets
depend on it (the rootfs build consumes kata-static-nvrc.tar.zst), and
add the rootfs-image-nvidia-gpu-{base,addon} build targets to the
local-build Makefile and the nvgpu bundle.
Build nvrc and the base/addon rootfs images in the amd64/arm64 static
tarball workflows (nvrc is baked into the rootfs and pruned from the
release like the other guest components), and point the NVIDIA shim
components at the composable base + gpu addon (+ coco addon for the
confidential classes). The monolithic images are still built/shipped.
c0af6781a0