Refactor `PortPoolMemoryBlock`

## Brief feature description

From a todo inside of `port_pool_memory_block.hpp`: The PortPool needs to be refactored to use a typed MemPool once that is done, the cTor needs a configuration similar to MemPoolCollectionMemoryProvider

At the moment it seems that we can remove this also completely and replace it later with dynamic size types.

Start with the TODO in port_pool_memory_block.hpp and review the current PortPoolMemoryBlock design alongside the typed MemPool and MemPoolCollectionMemoryProvider references mentioned in the issue. Clarify whether the goal is a typed MemPool migration, constructor configuration, or complete removal in favor of dynamic-size types; done requires a documented decision and corresponding refactor.

Written by the indexing model from the issue text.