fix(op-node): handle async disconnects to avoid test flakiness

[felipe-op]

Description

This change implements a simple retry strategy for p2p disconnect in tests. The disconnect operation is async and we need to verify the peer was correctly released, so we check few times with an increasing delay to avoid test flakiness.

Part of https://github.com/ethereum-optimism/devinfra-pod/issues/38

[coderabbitai]

Walkthrough

Walkthrough

The recent update introduces a retry mechanism to the peer disconnection process in the TestP2PFull function. This enhancement aims to improve the robustness of the peer disconnection procedure by attempting multiple retries before considering the operation failed. This change reflects a more resilient approach to handling peer disconnections in network tests.

Changes

File(s)	Change Summary
op-node/p2p/host_test.go	Added a retry mechanism for disconnecting a peer in the TestP2PFull function.

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[mslipper]

LGTM, ran this test with -count of 1000 and it didn't fail once.