substrate runner: increase line read + dump CLI output if parsing fails #5167

Job	Run time
Check unused dependencies	37s
Cargo fmt	14s
Cargo check	8m 27s
Cargo clippy	6m 44s
Check documentation and run doc tests	7m 52s
Cargo check (WASM)	1m 48s
Cargo clippy (WASM)	52s
Test (no_std)	2m 32s
Test (Unstable Backend)	9m 9s
Test (WASM)	9m 22s
Test (Light Client)	7m 45s
Test (Native)	7m 47s
	1h 3m 9s

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