stackoutputs: add deserializer and size validation #4273

Job	Run time
no-std (stable, wasm32-unknown-unknown)	49s
Clippy	34s
rustfmt	5s
no-std (nightly, wasm32-unknown-unknown)	54s
Check Rust stable on ubuntu with --all-targets --no-default-features	36s
Test Rust stable on ubuntu with --profile test-release	4m 58s
Check Rust stable on ubuntu with --all-targets	48s
Test Rust nightly on windows-2022	0s
Test Rust stable on ubuntu with --profile test-release --doc	2m 46s
Check Rust stable on ubuntu with --all-targets --all-features	41s
Test Rust nightly on ubuntu with --profile test-release	5m 33s
Test Rust nightly on ubuntu with --profile test-release --doc	2m 55s
Check Rust nightly on ubuntu with --all-targets --no-default-features	47s
Check Rust nightly on ubuntu with --all-targets	2m 25s
Check Rust nightly on ubuntu with --all-targets --all-features	46s
	24m 37s

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