feat(query): deprecate clickhouse's tcp protocol support

[sundy-li]

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Summary

Summary about this PR

deprecate clickhouse's tcp protocol support

See the RFC document for the reasons.

Fixes #6951

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Name	Status	Preview	Updated
databend	⬜️ Ignored (Inspect)		Aug 5, 2022 at 10:30PM (UTC)

[sundy-li]

@Xuanwo @flaneur2020

Is that ok if we remove these useless configs? Or just keep them as stale configs.

I prefer to remove them.

# Query ClickHouse Handler.
pub clickhouse_handler_host: String,
pub clickhouse_handler_port: u16,

[Xuanwo]

We can remove them in the inner config, but still need to keep them in the outer config until we decide to do a break change to out config.

[sundy-li]

I have two major passions in life.

1. Writing code
2. Delete the code I have written

[Xuanwo]

I have two major passions in life.

1. Writing code
2. Delete the code I have written

My hobby is relatively simple: delete the code written by @sundy-li

[PsiACE]

LGTM 🚀

Now that the clickhouse tcp protocol has been removed, I think we no longer rely on clickhouse-driver.

I am also concerned if we need to keep the opensrv-clickhouse introduced in datavalues