refactor: remove hard-coded Keccak constants in aggregator

[darth-cy]

Describe the feature you would like

Currently, the aggregator code contains constants specifying the Keccak row arrangement, which prevents easy adjustment to Keccak's internal parameters. The goal is to decouple Keccak constants and make aggregator agnostic to the internal row shapes of the Keccak circuit.

This issue and corresponding PR will resolve Keccak constants. A follow up issue and PR will resolve treatment of MAX_AGG_SNARKS within aggregator.

Additional context

No response