LinkCompaction: Add Link Compaction related interfaces#232

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royguo wants to merge 5 commits intobytedance:link-compactionfrom

royguo:link-compaction-sketch

Commits on Apr 11, 2022

LinkCompaction: Add LevelCompactionBuilder::PickLinkCompaction
royguo
committed

Commits on Apr 20, 2022

LinkCompaction: Add LinkSstIterator and implement all its related interfaces
royguo
committed
LinkCompaction: Add LinkSST support in TableCache::Get
royguo
committed

Commits on Apr 26, 2022

LinkCompaction: Fix a few LinkSstIterator issues
royguo
committed

Commits on May 10, 2022

[WIP]LinkCompaction: Add LinkCompactionIterator and reformat LinkSstIterator
royguo
committed