Validate builder configs in CI

[0xmichalis]

📝 Summary

Add a CLI tool to validate the builder config and run it in CI to validate all configs found in the root of the repo.

💡 Motivation and Context

Fix #278

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✅ I have completed the following steps:

• Run make lint
• Run make test
• Added tests (if applicable)

[github-actions]

Benchmark results for a235b79

Report: https://flashbots-rbuilder-ci-stats.s3.us-east-2.amazonaws.com/benchmark/a235b79-2e4c1ab/report/index.html

Date (UTC)	2024-12-18T16:42:35+00:00
Commit	a235b79994fe9264a83b1a360e244503271ce9e0
Base SHA	2e4c1ab8bc46e6110ef58fe39ac46160f6a7abbe

Significant changes

Benchmark	Mean	Status
gather_nodes_shared_cache	6.93%	Performance has degraded.
MEV-Boost SubmitBlock serialization/JSON encoding	-37.72%	Performance has improved.