Support OnionPerf analysis file version 3.0
As discussed in tpo/metrics/onionperf#33974, we'll have to update metrics-lib to support OnionPerf analysis file version 3.0. Assigning to me.
As discussed in tpo/metrics/onionperf#33974, we'll have to update metrics-lib to support OnionPerf analysis file version 3.0. Assigning to me.