Remove kas KubernetesApi service from SLI

Mikhail Mazurskiyrequested to merge
ash2k/exlude-kube-api-proxy-service into master
This gRPC service can produce errors as part of normal operation because it proxies requests to Kubernetes clusters. Such requests can fail because of network issues, cluster issues. We don't want our SLI to depend on second party reliability.
Edited by Mikhail Mazurskiy

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