refactor(iroh-willow): use willow-rs #9785

Job	Run time
cargo deny	30s
Checking docs	1m 22s
Android Build Only (aarch64-linux-android)	1m 10s
Android Build Only (armv7-linux-androideabi)	51s
Checking fmt	13s
check_semver	2m 31s
Checking typos	4s
clippy_check	2m 6s
codespell	4s
Cross Test (i686-unknown-linux-gnu)	30s
Docker Test	2m 40s
Cross Build Only (x86_64-unknown-freebsd)	52s
Minimal Supported Rust Version	1m 53s
Run network simulations/benchmarks	34s
Build wasm32	39s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1m 25s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1m 30s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 30s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	1m 55s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	2m 20s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	49s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	2m 22s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	1m 47s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	2s
	29m 39s

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