Update metrics catalog kubeconfig.labelselectors definition
Issue: gitlab-com/gl-infra/delivery#2238 (closed)
Related MR to add labels: https://ops.gitlab.net/gitlab-com/gl-infra/config-mgmt/-/merge_requests/3963
This MR is to update the kubeConfig.labelSelectors
for kube serviceDefinition to account for the new labels given to default
and highmem
node pools.