Rust

Migrate custom error trait impls to `thiserror` #5433

Job	Run time
Cargo fmt	12s
Check unused dependencies	35s
Cargo check	4m 48s
Cargo clippy	4m 52s
Check documentation and run doc tests	4m 48s
Cargo check (WASM)	1m 18s
Cargo clippy (WASM)	42s
Test (no_std)	1s
Test chainhead backend	1s
Test (Native)	1s
Test (Light Client)	1s
Test (WASM)	1s
	17m 20s

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