test(iroh): Fix test_active_relay_inactive test being flaky

[matheus23]

Description

This reverts a change from this PR: #3384

I originally thought I could make this test more reliable by pausing the tokio time across the tokio::time::timeout calls, but it turns out that actually makes the test more flaky:

• When time is paused, the timeout will immediately fire once the tokio runtime has no more CPU work to do.
• It's possible that there's no CPU work to do anymore, while there's something else that is actually still doing work, e.g. networking.
• Before the ActiveRelayActor finishes its run_connected loop, it will call client_sink.close().await, which will do actual I/O. When the tokio runtime is paused at that moment, it'll immediately trigger the test's timeout.

Notes & open questions

I couldn't reproduce this problem even across a couple thousand runs of the test locally. I'm not super confident that this fixes things, but I've analyzed the logs and this seems to be the most likely thing that's happening to me.

Closes #3613

Change checklist

• Self-review.

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Documentation for this PR has been generated and is available at: https://n0-computer.github.io/iroh/pr/3680/docs/iroh/

Last updated: 2025-11-18T17:08:59Z

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