Your company has announced that they will be outsourcing operations functions. You want to allow developers to easily stage new versions of a cloud-based application in the production environment and allow the outsourced operations team to autonomously promote staged versions to production. You want to minimize the operational overhead of the solution. Which Google Cloud product should you migrate to?

App Engine is the correct choice because its built-in versioning and traffic splitting features directly support the requirement to stage new application versions and allow an operations team to promote them to production with minimal effort. This platform-as-a-service (PaaS) offering significantly reduces operational overhead compared to other options. GKE On-Prem introduces significant operational overhead for managing the Kubernetes clusters and underlying infrastructure on-premises, which goes against the goal of minimizing overhead. Compute Engine offers virtual machines, requiring manual management of the operating system, runtime, and application deployment, which is too much operational overhead for this scenario. Google Kubernetes Engine (GKE) is a powerful container orchestration platform but still requires more operational management for deployment pipelines and traffic management than App Engine's integrated features.