refactor!: remove some admin APIs (#3821) #403

Job	Run time
Clippy	2m 16s
Check (windows-latest)	6m 46s
Check typos and docs	19s
Build GreptimeDB binaries (ubuntu-20.04)	4m 11s
Check (ubuntu-20.04)	1m 32s
coverage	1s
Rustfmt	24s
Toml Check	25s
Sqlness Test with Kafka Wal (ubuntu-20.04)	2m 57s
Fuzz Test (fuzz_create_table)	4m 31s
Sqlness Test (ubuntu-20.04)	2m 20s
Fuzz Test (fuzz_alter_table)	4m 42s
Fuzz Test (fuzz_create_database)	4m 59s
Fuzz Test (fuzz_create_logical_table)	4m 27s
	39m 50s

Provide feedback