feat: enable telemetry pre-processors for appinsights

• This MR adds a telemetry pre-processor for azure appinsights. This ensure that the appinsights request logs have custom dimensions involving correlation-id and client-id.

• Client-id is set to the azp value in the authorization JWT. This is added to the custom dimensions only if azp value is available in the decoded token

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• The server initialization middleware ensures a correlation-id is always generated if no value is present in the request for it.

  In the log below no correlation-id was sent in the request. The backend server middleware auto-generated a correlation-id and inserted in the request headers