refactor: Change the error type in the pipeline crate from String to Error #20014

Job	Run time
Build GreptimeDB binaries (ubuntu-20.04)	2m 57s
Build GreptimeDB binary (profile-CI) (ubuntu-20.04)	3m 1s
Check typos and docs	8s
Check (windows-2022)	7m 33s
Check (ubuntu-20.04)	2m 5s
Clippy	3m 41s
coverage	14m 23s
Rustfmt	53s
Check License Header	2m 5s
Toml Check	31s
Sqlness Test (Basic)	2m 44s
Fuzz Test (fuzz_create_table)	5m 31s
Sqlness Test (Remote WAL)	3m 11s
Fuzz Test (fuzz_alter_table)	4m 55s
Fuzz Test (fuzz_create_database)	6m 11s
Fuzz Test (fuzz_create_logical_table)	5m 28s
Fuzz Test (fuzz_alter_logical_table)	6m 40s
Fuzz Test (fuzz_insert)	7m 17s
Fuzz Test (fuzz_insert_logical_table)	6m 37s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_migrate_mito_regions)	8m 47s
Fuzz Test (Distributed, Remote WAL, fuzz_create_table)	7m 59s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_failover_mito_regions)	7m 2s
Fuzz Test (Distributed, Remote WAL, fuzz_alter_table)	8m 41s
Unstable Fuzz Test (unstable_fuzz_create_table_standalone)	6m 57s
Fuzz Test with Chaos (Distributed, Remote WAL, fuzz_failover_metric_regions)	8m 34s
Fuzz Test (Distributed, Remote WAL, fuzz_create_database)	6m 58s
Fuzz Test (Distributed, Remote WAL, fuzz_create_logical_table)	8m 29s
Fuzz Test (Distributed, Remote WAL, fuzz_alter_logical_table)	7m 15s
Fuzz Test (Distributed, Remote WAL, fuzz_insert)	8m 58s
Fuzz Test (Distributed, Remote WAL, fuzz_insert_logical_table)	10m 7s
	2h 55m 38s

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