chore(query): Reopen keep-alive for MySQL & rollback socket2 to 0.4

[yufan022]

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Summary

Summary about this PR

Closes #10641

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Name	Status	Preview	Comments	Updated
databend	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Mar 19, 2023 at 1:44AM (UTC)

[sundy-li]

cc @TCeason It's strange that the test result contain grant to system.one.

[SQL] SHOW GRANTS FOR 'test-grant'@'localhost'
[Diff] (-expected|+actual)
    GRANT ALL ON 'default'.'default'.* TO 'test-grant'@'localhost'
    GRANT SELECT ON 'default'.'db01'.* TO 'test-grant'@'localhost'
-   GRANT SELECT ON 'default'.'db01'.'tb1' TO 'test-grant'@'localhost'
-   GRANT SELECT ON 'default'.'system'.'one' TO 'test-grant'@'localhost'
+   GRANT SELECT ON 'default'.'db01'.'tb1' TO 'test-grant'@'localhost'
at tests/sqllogictests/suites/base/05_ddl/05_0006_ddl_grant_privilege:49

[BohuTANG]

@mergify update

[mergify]

update

✅ Branch has been successfully updated

[dantengsky]

LGTM