Make default build push to prod tier
Since we are planning to run a single instance of Secure Agent, let that be the prod instance.
Improve security with one click by enabling Secret Push Protection for your projects: https://docs.gitlab.com/ee/user/application_security/secret_detection/secret_push_protection/#enable-secret-push-protection-in-a-project
Since we are planning to run a single instance of Secure Agent, let that be the prod instance.