test: add test for iroh-dns-server with mainline #8024

Job	Run time
Checking fmt and docs	1m 20s
Cross compile (i686-unknown-linux-gnu)	2m 26s
check_semver	3m 31s
Cross compile (armv7-linux-androideabi)	1m 1s
cargo deny	35s
clippy_check	2m 22s
Cross compile (aarch64-linux-android)	1m 15s
Minimal Supported Rust Version	1m 45s
Run network simulations/benchmarks	7m 14s
CI Test Suite / Tests (ubuntu-latest, stable, all)	2m 16s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1m 58s
CI Test Suite / Tests (ubuntu-latest, stable, default)	2m 48s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	3m 27s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	2m 45s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	3m 26s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	2m 36s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	3m 29s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	2m 36s
	46m 50s

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