test: basic p2p resilience

[just-mitch]

Depends on #8027

We need to ensure our QoS metrics are met in the following scenarios:

Scenarios

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1. Small number of nodes (e.g., 10-50 nodes)
2. Many nodes joining the network (e.g., 100 nodes joining over 5 minutes)
3. Large number of nodes (e.g., 1000+ nodes)
4. Many nodes leaving the network (e.g., 20% of nodes disconnecting over 5 minutes)