fix: Remove duplicate FilterOld and consolidate on Filter

[maradini77]

Description

• The method FilterOld duplicated the address/topic filtering logic already implemented by Filter.
• This change removes FilterOld (marked as deprecated) and updates tests to use Filter(..., 0).

Rationale

• Reduces duplicate code and API surface.
• Ensures a single source of truth for log filtering.
• Improves maintainability with no functional change in behavior.

[taratorio]

@maradini77 hi, can you please pull latest code from main onto your branch (in particular c6c01d6) to get your Kurtosis CI green. Also you seem to have a linter error.