stackoutputs: add deserializer and size validation #4276

Job	Run time
Clippy	42s
Check Rust stable on ubuntu with --all-targets --no-default-features	53s
Test Rust stable on ubuntu with --profile test-release	4m 59s
Check Rust stable on ubuntu with --all-targets	38s
no-std (stable, wasm32-unknown-unknown)	44s
Test Rust stable on ubuntu with --profile test-release --doc	2m 54s
rustfmt	8s
Check Rust stable on ubuntu with --all-targets --all-features	54s
no-std (nightly, wasm32-unknown-unknown)	46s
Test Rust nightly on ubuntu with --profile test-release	5m 22s
Check Rust nightly on ubuntu with --all-targets --no-default-features	53s
Test Rust nightly on ubuntu with --profile test-release --doc	2m 55s
Check Rust nightly on ubuntu with --all-targets	46s
Test Rust nightly on windows-2022	0s
Check Rust nightly on ubuntu with --all-targets --all-features	50s
	23m 24s

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