Backport of api-gateway: add unit tests verifying scaling parameters on GatewayClassConfig are obeyed into release/1.2.x#2324

hc-github-team-consul-core merged 2 commits intorelease/1.2.xhashicorp/consul-k8s:release/1.2.xfrom

backport/NET-4319-Unit-Gateway-Deployment-obeys-scaling-parameters-on-GatewayClassConfig/visually-inspired-duckhashicorp/consul-k8s:backport/NET-4319-Unit-Gateway-Deployment-obeys-scaling-parameters-on-GatewayClassConfig/visually-inspired-duckCopy head branch name to clipboard