Gloas: also count weight from equivocating committee members when determining if head is weak

### Problem description

In gloas, spec's `is_head_weak` is updated to also count weight from equivocating committee validators in addition to just the the active ones from `calculate_committee_fraction`.

We need to update
https://github.com/ChainSafe/lodestar/blob/433e692fd99ad61b9076a0d91a8fe0f9ebdb6dad/packages/fork-choice/src/forkChoice/forkChoice.ts#L418-L428

This is covered in https://github.com/ethereum/consensus-specs/pull/4807 as one of the few things the PR aimed to solve

### Solution description

Implement per spec.

### Additional context

_No response_