refactor: make the command entry cleaner #16371

Job	Run time
Toml Check	20s
Check License Header	1m 11s
Check (windows-2022)	1m 33s
Check (ubuntu-20.04)	1m 33s
Build GreptimeDB binaries (ubuntu-20.04)	4m 24s
Check typos and docs	5s
Clippy	2m 51s
Rustfmt	30s
coverage	6m 27s
Unstable Fuzz Test (unstable_fuzz_create_table_standalone)	4m 21s
Sqlness Test (ubuntu-20.04)	2m 15s
Fuzz Test (fuzz_create_table)	4m 21s
Sqlness Test with Kafka Wal (ubuntu-20.04)	2m 56s
Fuzz Test (fuzz_alter_table)	4m 21s
Fuzz Test (fuzz_create_database)	4m 22s
Fuzz Test (fuzz_create_logical_table)	4m 20s
Fuzz Test (fuzz_alter_logical_table)	4m 19s
Fuzz Test (fuzz_insert)	4m 21s
Fuzz Test (fuzz_insert_logical_table)	4m 20s
	58m 50s

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