Feature: support index for join performance optimization

[zhang2014]

Summary In ClickHouse, users can speed up the join query by create join engine: https://clickhouse.com/docs/en/engines/table-engines/special/join

In firebolt, users can speed up the join query by creating a join index: https://docs.firebolt.io/using-indexes/index-quick-reference.html#join-indexes

Details of ideas in databend:

• When writing data, create hash table for each insert and persist it
• The drive hash table is built in parallel through the index when join.
• When two tables join, the table with index is preferred as the driver table. The table with more data is selected as the driver table when both tables have indexes.