Add tools/packaging/kata-deploy/binary as a workspace member, inherit shared
dependency versions from the root manifest, and refresh Cargo.lock.
Build the kata-deploy image from the repository root: copy the workspace
layout into the rust-builder stage, run cargo test/build with -p kata-deploy,
and adjust artifact and static asset COPY paths. Update the payload build
script to invoke docker buildx with -f .../Dockerfile from the repo root.
Add a repo-root .dockerignore to keep the Docker build context smaller.
Document running unit tests with cargo test -p kata-deploy from the root.
Signed-off-by: Fabiano Fidêncio <ffidencio@nvidia.com>
