bug: found duplicate series in Gateway dashboard

[david-martin]

execution: found duplicate series for the match group {instance="10.131.0.93:8081", name="prod-web", namespace="monitoring"} on the left hand-side of the operation: [{__name__="gatewayapi_gateway_created", container="kube-state-metrics", customresource_group="gateway.networking.k8s.io", customresource_kind="Gateway", customresource_version="v1beta1", exported_namespace="multi-cluster-gateways", instance="10.131.0.93:8081", job="kube-state-metrics-stitch-poc", name="prod-web", namespace="monitoring", prometheus="openshift-user-workload-monitoring/user-workload"}, {__name__="gatewayapi_gateway_created", container="kube-state-metrics", customresource_group="gateway.networking.k8s.io", customresource_kind="Gateway", customresource_version="v1beta1", exported_namespace="kuadrant-multi-cluster-gateways", instance="10.131.0.93:8081", job="kube-state-metrics-stitch-poc", name="prod-web", namespace="monitoring", prometheus="openshift-user-workload-monitoring/user-workload"}];many-to-many matching not allowed: matching labels must be unique on one side