Add baseline leader_epoch support for ListOffsets v4 / FetchRequest v10 #2511
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Adds leader_epoch fields to
OffsetAndMetadata
andOffsetAndTimestamp
structs. Addscluster.leader_epoch_for_partiiton(tp)
for future use. For now all apis use -1 as leader_epoch. This should be ok for 2.1 baseline, but need to implement full leader_epoch support before bumping to FetchRequest v11 (v2.3).Note that FetchRequest v10 also enables zstd compression.