feat: support `ALTER TABLE ... MODIFY COLUMN ... ...` #15631

Job	Run time
Check (windows-latest)	7m 39s
Check typos and docs	19s
Build GreptimeDB binaries (ubuntu-20.04)	4m 18s
Check (ubuntu-20.04)	1m 36s
Clippy	2m 18s
Rustfmt	27s
Toml Check	36s
coverage	15m 2s
Sqlness Test with Kafka Wal (ubuntu-20.04)	3m 14s
Sqlness Test (ubuntu-20.04)	2m 34s
Fuzz Test (fuzz_create_table)	4m 37s
Fuzz Test (fuzz_alter_table)	4m 40s
Fuzz Test (fuzz_create_database)	5m 42s
Fuzz Test (fuzz_create_logical_table)	4m 23s
Fuzz Test (fuzz_alter_logical_table)	4m 31s
	1h 1m 56s

Provide feedback