use clickhouse-go v2

[yuzhichang]

According to https://github.com/ClickHouse/clickhouse-go#benchmark, clickhouse-go v2 is 2-3x of v1.

[yuzhichang]

I'm blocked.

• clickhouse-go v1 doesn't support Bool.
• clickhouse-go v2 doesn't allow implicitly insertion type conversion such as Float64 to Decimal.

According to https://github.com/ClickHouse/clickhouse-go/issues/574,

Currently, v2 has a number of functional gaps where no precision would be lost and conversion could be safely performed.

[wallflower]

Looks like v2 might be getting some of the features petty soon

https://github.com/ClickHouse/clickhouse-go/pull/616

[yuzhichang]

done at b492fc8bde1d6cab16a0fe3d3f15a0c2397e6de6