Implement builder circuit breaker functionality / liveness failsafe

[nflaig]

From https://github.com/ethereum/builder-specs/pull/95:

Honest proposers implement a "circuit breaker" condition operationalized by the beacon node that is triggered when the node determines the chain is unhealthy. When the circuit breaker is fired, proposers MUST not utilize the external builder network and exclusively build locally.

[nflaig]

We already have

• faultInspectionWindow: Window to inspect missed slots for enabling/disabling builder circuit breaker
• allowedFaults: Number of missed slots allowed in the faultInspectionWindow for builder circuit

https://github.com/ChainSafe/lodestar/blob/3fb0f5cc6c121e154fef3ee06c0ffd6f59a4c840/packages/beacon-node/src/execution/builder/http.ts#L72-L88

is there anything else we would want to implement? If not this can be closed

[nflaig]

Behavior noted in https://github.com/ChainSafe/lodestar/issues/6325#issuecomment-2239316466 seems sufficient to me, closing for now