Integrate `ouroboros-consensus` for `node-8.11.0` (SRP)

[Lucsanszky]

Changelog

- description: |
    Fixed typo in `--ref-script-cost-per-byte` help.
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  # - improvement    # QoL changes e.g. refactoring
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Checklist

• [x] Commit sequence broadly makes sense and commits have useful messages
• [ ] New tests are added if needed and existing tests are updated. See Running tests for more details
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[smelc]

Superseded by https://github.com/IntersectMBO/cardano-cli/pull/761

[github-actions[bot]]

This PR is stale because it has been open 45 days with no activity.

[carbolymer]

Closing as the changes were already integrated