[Agent API]: Add new metrics in the agent api

[LorenzoTettamanti]

Is your feature request related to a problem?

• Yes

  Problem Description:

  After the latest core update new metrics has been added to the metrics list. Reference

  Solution:

  Add new endpoints in the agent API protobuf file .

  Needed Endpoints:

  • Latency metrics
  • Packet loss metrics
  • dropped TCP packets

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