CP-21576: Add Config command for Listing Kubernetes Services

[bdrennz]

This PR adds a new command, list-services, to the config suite. The command finds all the active services within the a given Cluster. Users have the option to specify a --kubeconfig, or by the configuration found in the current directory.

Testing:

(system) ➜  cloudzero-agent-validator git:(cp-21576) ./bin/cloudzero-agent-validator config list-services --kubeconfig /tmp/bdren.kubeconfig                                                                                                        <aws:cz-research.Engineering> <region:us-east-1>(⎈|arn:aws:eks:us-east-1:975482786146:cluster/bdren:default)
Services in all namespaces:
 - cz-prom-agent-kube-state-metrics (Namespace: default)
 - cz-prom-agent-prometheus-node-exporter (Namespace: default)
 - kubernetes (Namespace: default)
 - cz-prom-agent-kube-prometh-kubelet (Namespace: kube-system)
 - kube-dns (Namespace: kube-system)
 - metrics-server (Namespace: kube-system)
 - my-otel-demo-adservice (Namespace: otel)
 - my-otel-demo-cartservice (Namespace: otel)
 - my-otel-demo-checkoutservice (Namespace: otel)
 - my-otel-demo-currencyservice (Namespace: otel)
 - my-otel-demo-emailservice (Namespace: otel)
 - my-otel-demo-featureflagservice (Namespace: otel)
 - my-otel-demo-ffspostgres (Namespace: otel)
 - my-otel-demo-frontend (Namespace: otel)
 - my-otel-demo-frontendproxy (Namespace: otel)
 - my-otel-demo-grafana (Namespace: otel)
 - my-otel-demo-jaeger-agent (Namespace: otel)
 - my-otel-demo-jaeger-collector (Namespace: otel)
 - my-otel-demo-jaeger-query (Namespace: otel)
 - my-otel-demo-kafka (Namespace: otel)
 - my-otel-demo-loadgenerator (Namespace: otel)
 - my-otel-demo-otelcol (Namespace: otel)
 - my-otel-demo-paymentservice (Namespace: otel)
 - my-otel-demo-productcatalogservice (Namespace: otel)
 - my-otel-demo-prometheus-server (Namespace: otel)
 - my-otel-demo-quoteservice (Namespace: otel)
 - my-otel-demo-recommendationservice (Namespace: otel)
 - my-otel-demo-redis (Namespace: otel)
 - my-otel-demo-shippingservice (Namespace: otel)
 - otel-demo-opensearch (Namespace: otel)
 - otel-demo-opensearch-headless (Namespace: otel)

[josephbarnett]

a few nits - but generally pretty cool! 🙌