Sync nitro v3.2.1

[sveitser]

Sync commit f328006 used by nitro v.3.2.1: https://github.com/OffchainLabs/nitro/tree/v3.2.1

[CLAassistant]

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1 out of 2 committers have signed the CLA.

✅ sveitser
❌ PlasmaPower
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