feat: add `add_handler_after`, `add_handler_before`, `replace_handler… #20127

Job	Run time
Check typos and docs	7s
Check (windows-2022)	10m 40s
Check License Header	2m 16s
Build GreptimeDB binaries (ubuntu-20.04)	3m 10s
Build GreptimeDB binary (profile-CI) (ubuntu-20.04)	3m 24s
Check (ubuntu-20.04)	2m 20s
Toml Check	2m 19s
Clippy	3m 42s
Rustfmt	42s
coverage	14m 49s
Sqlness Test (Basic)	2m 43s
Fuzz Test (fuzz_create_table)	4m 35s
Fuzz Test (fuzz_alter_table)	8m 11s
Sqlness Test (Remote WAL)	3m 13s
Fuzz Test (fuzz_create_database)	6m 30s
Fuzz Test (fuzz_create_logical_table)	7m 10s
Fuzz Test (fuzz_alter_logical_table)	5m 59s
Fuzz Test (fuzz_insert)	6m 6s
Fuzz Test (fuzz_insert_logical_table)	6m 30s
Unstable Fuzz Test (unstable_fuzz_create_table_standalone)	6m 19s
Fuzz Test (Distributed, Remote WAL, fuzz_create_table)	7m 0s
Fuzz Test (Distributed, Remote WAL, fuzz_alter_table)	7m 6s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_migrate_mito_regions)	7m 52s
Fuzz Test (Distributed, Remote WAL, fuzz_create_database)	9m 22s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_failover_mito_regions)	9m 20s
Fuzz Test (Distributed, Remote WAL, fuzz_create_logical_table)	10m 55s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_failover_metric_regions)	8m 34s
Fuzz Test (Distributed, Remote WAL, fuzz_alter_logical_table)	8m 39s
Fuzz Test with Chaos (Distributed, Local WAL, fuzz_migrate_mito_regions)	8m 36s
Fuzz Test (Distributed, Remote WAL, fuzz_insert)	8m 58s
Fuzz Test (Distributed, Remote WAL, fuzz_insert_logical_table)	7m 43s
	3h 14m 50s

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