message: add fast_init=true to rustwide workspace builder
diff: @@ -87,6 +87,9 @@ impl RustwideBuilder {
  if let Some(custom_image) = &config.local_docker_image {
  builder = builder.sandbox_image(SandboxImage::local(&custom_image)?);
  }
  + if cfg!(test) {
  + builder = builder.fast_init(true);
  + }
  let workspace = builder.init()?;
  workspace.purge_all_build_dirs()?;
  