fix(iroh): don't hit network for complete blobs&collections #9611

Job	Run time
Cross Build Only (x86_64-unknown-freebsd)	1m 12s
Android Build Only (aarch64-linux-android)	1m 22s
cargo deny	28s
Checking docs	1m 7s
Android Build Only (armv7-linux-androideabi)	1m 25s
Checking fmt	26s
check_semver	5m 19s
Checking typos	11s
clippy_check	3m 12s
codespell	8s
Cross Test (i686-unknown-linux-gnu)	2m 3s
Docker Test	1m 36s
Minimal Supported Rust Version	1m 47s
Run network simulations/benchmarks	1m 14s
Build wasm32	30s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	1s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	1s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	3m 15s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	1s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	3m 59s
	29m 21s

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