Test multiple replicas of a gateway

[maleck13]

Summary

Ensure that if the number of replicas for a gateway is increased or decreased . RateLimiting and Auth continue to operator as expected

Documentation

kubectl scale deployment/some-gateway -n ingress-gateway --replicas=n

N/A
Additional context

Increasing and decreasing replicas will likely be a common use case for customers when traffic increases or decreases via use of something like a HPA (horizontal pod autoscaler) for example

Test cases

• Use HPA for scaling (both up and down)
• Use CLI for scaling (both up and down)