feat: Add vector search support to DataEvolutionBatchScan and rename topk to vector search#48

lszskye merged 7 commits intoalibaba:mainalibaba/paimon-cpp:mainfrom

lxy-9602:refactor-topk-to-vectorsearchlxy-9602/paimon-cpp:refactor-topk-to-vectorsearchCopy head branch name to clipboard