Both container_latest.yml and container_dev.yml use Dockerfile.go_build
which expects weed-volume-prebuilt/ with pre-compiled Rust binaries, but
neither workflow produced them, causing COPY failures during docker build.
Add build-rust-binaries jobs that natively cross-compile for amd64 and
arm64, then download and place the artifacts in the Docker build context.
Also fix the trivy-scan local build path in container_latest.yml.
47baf6c841