Introduce OffsetsForLeaderEpochRequest/Response

[swuferhong]

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Motivation

To use LeaderEpoch rather than HighWatermark for truncation, we need to introduce OffsetsForLeaderEpochRequest/Response to fetch the latest LeaderEpoch -> Offset info from leader to truncate log.

Solution

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Anything else?

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Willingness to contribute

• I'm willing to submit a PR!