Multiple Performance Enhancements for clickhouse-keeper

Multiple improvements for performance of clickhouse-keeper: less locking #35010 (zhanglistar), lower memory usage by streaming reading and writing of snapshot instead of full copy. #34584 (zhanglistar), optimizing compaction of log store in the RAFT implementation. #34534 (zhanglistar), versioning of the internal data structure #34486 (zhanglistar).