chore: add NCCL bench to the image

Dockerfile

@@ -27,12 +27,13 @@ RUN cargo install cargo-build-deps \
 FROM --platform=linux/amd64 build-image as build-app
 WORKDIR /src/gpu-iris-mpc
 COPY . .
-RUN cargo build --release --target x86_64-unknown-linux-gnu --bin server --bin client --bin key-manager --bin upgrade-server --bin upgrade-client --bin upgrade-checker
+RUN cargo build --release --target x86_64-unknown-linux-gnu --bin nccl --bin server --bin client --bin key-manager --bin upgrade-server --bin upgrade-client --bin upgrade-checker
 
 FROM --platform=linux/amd64 ghcr.io/worldcoin/iris-mpc-base:cuda12_2-nccl2_22_3_1
 ENV DEBIAN_FRONTEND=noninteractive
 
 # Include client, server and key-manager, upgrade-client and upgrade-server binaries
+COPY --from=build-app /src/gpu-iris-mpc/target/x86_64-unknown-linux-gnu/release/nccl /bin/nccl
 COPY --from=build-app /src/gpu-iris-mpc/target/x86_64-unknown-linux-gnu/release/server /bin/server
 COPY --from=build-app /src/gpu-iris-mpc/target/x86_64-unknown-linux-gnu/release/client /bin/client
 COPY --from=build-app /src/gpu-iris-mpc/target/x86_64-unknown-linux-gnu/release/key-manager /bin/key-manager

iris-mpc-gpu/Cargo.toml

@@ -52,3 +52,7 @@ harness = false
 [[bench]]
 name = "transpose"
 harness = false
+
+[[bin]]
+name = "nccl"
+path = "src/bin/nccl.rs"