@ivucica CI on master - .github/workflows: Set --build_metadata=ROLE=CI on Bazel CI builds. Setting it explicitly might not be required, but the documentation for BuildBuddy suggests it's a good idea.

@ivucica CI on master - .github/workflows: Set --build_metadata=ROLE=CI on Bazel CI builds. Setting it explicitly might not be required, but the documentation for BuildBuddy suggests it's a good idea. #67