Proto/abaab: consensus threshold update

What

Depends on !18915 (merged)

The consensus threshold needs to be reworked, because it will depend on the level. Same for consensus committee, but for this one it's a bit different since the committee is also used for other things than attestations. Regardless, changes need to be made

Why

How

Manually testing the MR

Checklist

• Document the interface of any function added or modified (see the coding guidelines)
• Document any change to the user interface, including configuration parameters (see node configuration)
• Provide automatic testing (see the testing guide).
• For new features and bug fixes, add an item in the appropriate changelog (docs/protocols/alpha.rst for the protocol and the environment, CHANGES.rst at the root of the repository for everything else).
• Select suitable reviewers using the Reviewers field below.
• Select as Assignee the next person who should take action on that MR