My workflow is configured to test, require approval, and then deploy cloud infrastructure. Infrastructure definition changes can be destructive and should be reviewed. Terraform can generate a plan, and Circle can carry it between jobs as an artifact or shared workspace file. CloudFormation can do something similar with its change set feature. I would like the approver to be prompted to review the generated plan in the confirmation prompt. I'd expect to configure the job with `type: approval` and e.g. `artifact_path: path/file`.