Enable native progressive/gradual rollout capabilities within Harness CD that allow users to deploy new application versions incrementally using percentage-based phasing (e.g., 10% → 25% → 50% → 100%) with manual or automated verification gates between phases. Unlike the current canary deployment approach which adds new instances alongside existing ones, this feature would progressively replace existing pods/instances with new versions, giving users fine-grained control to pause, validate, and resume deployments at each phase without doubling infrastructure resources.