feat(iroh): Accept custom protocols #8567

Job	Run time
Build wasm32	28s
Cross Test (i686-unknown-linux-gnu)	6m 36s
check_semver	5m 3s
Cross Build Only (armv7-linux-androideabi)	1m 3s
Cross Build Only (aarch64-linux-android)	1m 1s
cargo deny	29s
Cross Build Only (x86_64-unknown-freebsd)	1m 8s
Checking docs	1m 29s
Cross Build Only (x86_64-unknown-netbsd)	1m 7s
Checking fmt	10s
clippy_check	1m 59s
Minimal Supported Rust Version	1m 20s
Run network simulations/benchmarks	6m 58s
CI Test Suite / Tests (ubuntu-latest, stable, all)	2m 33s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	3m 52s
CI Test Suite / Tests (ubuntu-latest, stable, none)	2m 23s
CI Test Suite / Tests (ubuntu-latest, stable, default)	2m 10s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	3m 57s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	3m 50s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	3m 5s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	2m 53s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	2m 50s
	56m 24s

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