test: add kube-state-metrics deployment

[Michael Vittrup Larsen (michaelvl)]

Description

This PR is purely a test-harness additions. It adds a deployment of kube-state-metrics configured to report gateway api resource info.

Checklist

• Unit tests updated
• End user documentation updated
• If changes apply to Helm chart, a note have been made in the 'UNRELEASED' section of the charts CHANGELOG.md

[Michael Vittrup Larsen (michaelvl)]

Example metrics output from kube-state-metrics:

# HELP gatewayapi_gatewayclass_conditions GatewayClass conditions
# TYPE gatewayapi_gatewayclass_conditions gauge
gatewayapi_gatewayclass_conditions{controllerName="projectcontour.io/gateway-controller",customresource_group="gateway.networking.k8s.io",customresource_kind="GatewayClass",customresource_version="v1beta1",name="contour",type="Accepted"} 1
gatewayapi_gatewayclass_conditions{controllerName="github.com/tv2-oss/bifrost-gateway-controller",customresource_group="gateway.networking.k8s.io",customresource_kind="GatewayClass",customresource_version="v1beta1",name="contour-istio-cert",type="Accepted"} 1
gatewayapi_gatewayclass_conditions{controllerName="istio.io/gateway-controller",customresource_group="gateway.networking.k8s.io",customresource_kind="GatewayClass",customresource_version="v1beta1",name="istio",type="Accepted"} 1
# HELP gatewayapi_gatewayclass_info GatewayClass info
# TYPE gatewayapi_gatewayclass_info info
gatewayapi_gatewayclass_info{classname="projectcontour.io/gateway-controller",controllerName="projectcontour.io/gateway-controller",customresource_group="gateway.networking.k8s.io",customresource_kind="GatewayClass",customresource_version="v1beta1",name="contour"} 1
gatewayapi_gatewayclass_info{classname="github.com/tv2-oss/bifrost-gateway-controller",controllerName="github.com/tv2-oss/bifrost-gateway-controller",customresource_group="gateway.networking.k8s.io",customresource_kind="GatewayClass",customresource_version="v1beta1",name="contour-istio-cert"} 1
gatewayapi_gatewayclass_info{classname="istio.io/gateway-controller",controllerName="istio.io/gateway-controller",customresource_group="gateway.networking.k8s.io",customresource_kind="GatewayClass",customresource_version="v1beta1",name="istio"} 1
# HELP gatewayapi_gateway_conditions Gateway conditions
# TYPE gatewayapi_gateway_conditions gauge
gatewayapi_gateway_conditions{classname="contour-istio-cert",customresource_group="gateway.networking.k8s.io",customresource_kind="Gateway",customresource_version="v1beta1",name="foo-gateway",namespace="foo-infra",type="Accepted"} 1
gatewayapi_gateway_conditions{classname="contour-istio-cert",customresource_group="gateway.networking.k8s.io",customresource_kind="Gateway",customresource_version="v1beta1",name="foo-gateway",namespace="foo-infra",type="Programmed"} 1
gatewayapi_gateway_conditions{classname="contour-istio-cert",customresource_group="gateway.networking.k8s.io",customresource_kind="Gateway",customresource_version="v1beta1",name="foo-gateway",namespace="foo-infra",type="Ready"} 1
gatewayapi_gateway_conditions{classname="istio",customresource_group="gateway.networking.k8s.io",customresource_kind="Gateway",customresource_version="v1beta1",name="foo-gateway-child",namespace="foo-infra",type="Accepted"} 1
gatewayapi_gateway_conditions{classname="istio",customresource_group="gateway.networking.k8s.io",customresource_kind="Gateway",customresource_version="v1beta1",name="foo-gateway-child",namespace="foo-infra",type="Programmed"} 1
gatewayapi_gateway_conditions{classname="istio",customresource_group="gateway.networking.k8s.io",customresource_kind="Gateway",customresource_version="v1beta1",name="foo-gateway-child",namespace="foo-infra",type="Ready"} 1
gatewayapi_gateway_conditions{classname="istio",customresource_group="gateway.networking.k8s.io",customresource_kind="Gateway",customresource_version="v1beta1",name="foo-gateway-child",namespace="foo-infra",type="Scheduled"} 1
# HELP gatewayapi_gateway_info Gateway info
# TYPE gatewayapi_gateway_info info
gatewayapi_gateway_info{classname="aws-alb-crossplane-publicxxx",customresource_group="gateway.networking.k8s.io",customresource_kind="Gateway",customresource_version="v1beta1",name="bar-gateway",namespace="foo-infra"} 1
gatewayapi_gateway_info{classname="contour-istio-cert",customresource_group="gateway.networking.k8s.io",customresource_kind="Gateway",customresource_version="v1beta1",name="foo-gateway",namespace="foo-infra"} 1
gatewayapi_gateway_info{classname="istio",customresource_group="gateway.networking.k8s.io",customresource_kind="Gateway",customresource_version="v1beta1",name="foo-gateway-child",namespace="foo-infra"} 1
# HELP gatewayapi_httproute_conditions HTTPRoute conditions
# TYPE gatewayapi_httproute_conditions gauge
gatewayapi_httproute_conditions{customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-site-child",namespace="foo-site",type="Accepted"} 1
gatewayapi_httproute_conditions{customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-site-child",namespace="foo-site",type="ResolvedRefs"} 1
gatewayapi_httproute_conditions{customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-store",namespace="foo-store",type="Accepted"} 1
gatewayapi_httproute_conditions{customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-store-child",namespace="foo-store",type="Accepted"} 1
gatewayapi_httproute_conditions{customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-store-child",namespace="foo-store",type="ResolvedRefs"} 1
gatewayapi_httproute_conditions{customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-site",namespace="foo-site",type="Accepted"} 1
# HELP gatewayapi_httproute_info HTTPRoute 
# TYPE gatewayapi_httproute_info info
gatewayapi_httproute_info{classname="map[group:gateway.networking.k8s.io kind:Gateway name:foo-gateway-child namespace:foo-infra]",customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-store-child",namespace="foo-store"} 1
gatewayapi_httproute_info{classname="map[group:gateway.networking.k8s.io kind:Gateway name:foo-gatewayxxx namespace:foo-infra]",customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-sitexx",namespace="foo-site"} 1
gatewayapi_httproute_info{classname="map[group:gateway.networking.k8s.io kind:Gateway name:foo-gateway namespace:foo-infra]",customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-site",namespace="foo-site"} 1
gatewayapi_httproute_info{classname="map[group:gateway.networking.k8s.io kind:Gateway name:foo-gateway-child namespace:foo-infra]",customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-site-child",namespace="foo-site"} 1
gatewayapi_httproute_info{classname="map[group:gateway.networking.k8s.io kind:Gateway name:foo-gateway namespace:foo-infra]",customresource_group="gateway.networking.k8s.io",customresource_kind="HTTPRoute",customresource_version="v1beta1",name="foo-store",namespace="foo-store"} 1