gpu: Add NVIDIA GPU Confidential kernel target

This is a follow up to the work of minimizing targets, unifying TDX,SNP builds for NVIDIA GPUs

Fixes: #8828

Signed-off-by: Zvonko Kaiser <zkaiser@nvidia.com>

tools/packaging/static-build/kernel/Dockerfile

@@ -15,6 +15,7 @@ RUN apt-get update && \
 	    build-essential \
 	    ca-certificates \
 	    curl \
+	    debhelper \
 	    flex \
 	    git \
 	    iptables \