feat(metric): add interceptors to monitor gRPC using Prometheus

[halibobo1205]

What does this PR do?
Add interceptors to monitor gRPC services using Prometheus, inspired by https://github.com/grpc-ecosystem/java-grpc-prometheus
Why are these changes required?
1. Decoupled from the ApiAccessInterceptor.
2. Fix the response latency monitor of RPCs handled by the server, the startCall is asynchronous, so the latency is not recorded correctly.

    Histogram.Timer requestTimer = Metrics.histogramStartTimer(
          MetricKeys.Histogram.GRPC_SERVICE_LATENCY, endpoint);
      Listener<ReqT> res = next.startCall(call, headers); //  Starts asynchronous processing of an incoming call.
      Metrics.histogramObserve(requestTimer);
      return res;

This PR has been tested by:

• Unit Tests
• Manual Testing

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