Refactor stonedb #160

Job	Run time
QPG Tests (CockroachDB)	5m 59s
DBMS Tests (CockroachDB)	6m 13s
DBMS Tests (Citus)	6m 38s
DBMS Tests (ClickHouse)	15m 39s
DBMS Tests (Databend)	11m 40s
DBMS Tests (Apache Doris)	25s
DBMS Tests (DuckDB)	5m 39s
DBMS Tests (H2)	5m 37s
Java 13 Compatibility (DuckDB)	1m 5s
Java 14 Compatibility (DuckDB)	1m 2s
Java 15 EA Compatibility (DuckDB)	1m 11s
DBMS Tests (MariaDB)	1m 28s
DBMS Tests (Materialize)	12m 6s
QPG Tests (Materialize)	6m 53s
General tests	2m 0s
DBMS Tests (MySQL)	11m 8s
DBMS Tests (PostgreSQL)	11m 0s
Reducer Tests	51s
DBMS Tests (SQLite)	10m 59s
QPG Tests (SQLite)	5m 49s
DBMS Tests (StoneDB)	2m 59s
DBMS Tests (TiDB)	6m 15s
QPG Tests (TiDB)	5m 54s
DBMS Tests (YugabyteDB)	11m 43s
	2h 30m 13s

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