feature(backend): Update healthz service in KFP v2

[gkcalat]

Current state:

KFP v2 inherited HealthzSerivce from KFP v1:

service HealthzService {
  // Get healthz data.
  rpc GetHealthz(google.protobuf.Empty) returns (GetHealthzResponse) {
    option (google.api.http) = {
      get: "/apis/v2beta1/healthz"
    };
  }
}

message GetHealthzResponse {
  // TODO(gkcalat): redesign this service to return status
  // and move server configuration into a separate service
  // TODO(gkcalat): rename or deprecate v1beta1 HealthzService
  // 
  // Returns if KFP in multi-user mode
  bool multi_user = 3;
}

We need to:

1. Make the service consistent with its purpose and compliant with AIP
2. Move multi_user and other server configuration-related information to a separate service

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[thesuperzapper]

/reopen

[google-oss-prow]

@thesuperzapper: Reopened this issue.

In response to this:

/reopen

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[DharmitD]

@gkcalat @chensun could you elaborate on what the "AIP compliance" means? And where could I find relevant guidelines?

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

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This issue has been automatically closed because it has not had recent activity. Please comment "/reopen" to reopen it.