refactor: Change the error type in the pipeline crate from String to Error #20009

Job	Run time
Build GreptimeDB binary (profile-CI) (ubuntu-20.04)	17s
Build GreptimeDB binaries (ubuntu-20.04)	18s
Check typos and docs	5s
Check (windows-2022)	13s
Clippy	17s
coverage	0s
Check (ubuntu-20.04)	23s
Rustfmt	17s
Check License Header	27s
Toml Check	14s
Unstable Fuzz Test	1s
Fuzz Test with Chaos (Distributed, ${{ matrix.mode.name }}, ${{ matrix.target }})	1s
Fuzz Test (Distributed, ${{ matrix.mode.name }}, ${{ matrix.target }})	1s
Fuzz Test	1s
Sqlness Test (${{ matrix.mode.name }})	1s
	2m 36s

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