cl, execution: update Chiado bootnodes

[yperbasis]

The new boot nodes were provided by Chetna.

Summary

• replace the Chiado CL bootstrap list with four new discovery ENRs
• replace the Chiado EL bootnodes with four discovery-only enodes using UDP port 30303 and no TCP port
• remove configuration-specific Chiado bootstrap-list tests

Live network test

Started a fresh Chiado node from commit c43e35d with an empty datadir, no downloader, and no cached peers.

• EL maintained 7 peers: 1 eth69 peer and 6 eth71 peers
• Caplin maintained 1 compatible outbound peer and discovered 50 candidates during subnet search
• several CL candidates were rejected for fork mismatch, while the compatible peer remained connected
• Caplin downloaded history at about 15-18 blocks per second

Chiado has no EL DNS discovery and the CL static-peer list was empty, so the peer sets were reached through the new bootnodes. The records are discovery-only, so direct TCP sessions to the bootnodes are not expected.

TDD was not used because this is a mechanical bootnode configuration update.

[Copilot]

Pull request overview

Updates Chiado’s consensus-layer and execution-layer bootnodes.

Changes:

• Replaces CL bootstrap entries with four discovery ENRs.
• Replaces EL bootnodes with discovery-only enodes.
• Removes Chiado-specific bootstrap-list tests.

Reviewed changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 1 comment.

File	Description
cl/clparams/config.go	Updates Chiado CL bootnodes.
cl/clparams/config_test.go	Removes the supplied-node test.
cl/p2p/utils_test.go	Removes Chiado classification coverage.
execution/chain/spec/bootnodes.go	Updates Chiado EL discovery nodes.

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