refactor: put together HTTP headers #13490

Job	Run time
Check (windows-latest)	3m 54s
Build GreptimeDB binaries (ubuntu-20.04)	4m 12s
Check (ubuntu-20.04)	1m 20s
Clippy	1m 54s
coverage	10m 29s
Rustfmt	25s
Toml Check	15s
Spell Check with Typos	21s
Sqlness Test with Kafka Wal (ubuntu-20.04)	2m 18s
Compatibility Test	1m 44s
Sqlness Test (ubuntu-20.04)	1m 38s
	28m 30s

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