zenoh-test-ros2dds: add Cargo.lock and rust-toolchain.toml#419

JEnoch wants to merge 1 commit intomaineclipse-zenoh/zenoh-plugin-ros2dds:mainfrom

pin_zenoh-test-ros2ddseclipse-zenoh/zenoh-plugin-ros2dds:pin_zenoh-test-ros2ddsCopy head branch name to clipboard