[Grafana] Update Grafana dashboard and Resolve Legacy Query Failures in Data Source

[win5923]

Why are these changes needed?

1. Update the following dashboard plugins:
   • KubeRay-ApiServer-1650105351221.json
   • KubeRay-Controller-Runtime-Controllers-1650108080992.json
2. Resolve Legacy Query Failures in Data Source Issues Occurring in the KubeRay-ApiServer and KubeRay-Controller-Runtime-Controllers Dashboards.

before:

after:

• kubeRay-ApiServer:

• KubeRay-controller:

Since KubeRay-controller does not have a ServiceMonitor, I created one myself to scrape metrics.

apiVersion: monitoring.coreos.com/v1
kind: ServiceMonitor
metadata:
  labels:
    release: prometheus
  name: kuberay-operator-metrics-monitor
  namespace: prometheus-system
spec:
  endpoints:
    - path: /metrics
      targetPort: http
  namespaceSelector:
    matchNames:
      - default
  selector:
    matchLabels:
      app.kubernetes.io/name: kuberay-operator

I deployed Prometheus and Grafana according to the official documentation, with the following versions:

• kube-prometheus-stack: v48.2.1
• kind: v1.31.0
• kuberay-operator: v1.2.2
• kuberay-apiserver:v1.2.2

Related issue number

Closes #2400

Checks

• I've made sure the tests are passing.
• Testing Strategy
  • Unit tests
  • Manual tests
  • This PR is not tested :(

[win5923]

Currently, I am encountering several issues while testing the KubeRay-ApiServer Dashboard. The following metrics are all 0:

• grpc_server_handled_total
• grpc_server_started_total
• grpc_server_msg_received_total
• grpc_server_msg_sent_total
• grpc_server_started_total

The following logs appear for the KubeRay-ApiServer:

I1009 13:31:34.630892       1 client_manager.go:52] Initializing client manager
I1009 13:31:34.631265       1 client_manager.go:71] Client manager initialized successfully
I1009 13:31:34.631294       1 main.go:112] Starting Http Proxy
I1009 13:31:34.631426       1 main.go:74] Starting gRPC server
2024/10/09 13:32:35 ERROR: Failed to extract ServerMetadata from context
2024/10/09 13:32:35 ERROR: Failed to extract ServerMetadata from context