Run reproducible build in CI

Author: xxuejie

.github/workflows/rust.yml

@@ -37,6 +37,8 @@ jobs:
         git submodule add https://github.com/xxuejie/lib-dummy-atomics deps/lib-dummy-atomics
     - name: Run all checks
       run: cd test-workspace && make build test check clippy
+    - name: Reproducible build runs
+      run: cd test-workspace && ./scripts/reproducible_build_docker --update && ./scripts/reproducible_build_docker --no-clean
     - name: Generate standalone contract
       run: cargo generate --path . standalone-contract --name test-contract
     - name: Run all checks