Refactor: Move duplicated Aggregator calculation logic into Logic Classes

[Maelstromeous]

Like I've done for the Vehicle Destroy and Vehicle Character Death logics, move the calculation logic into a singlar class so we can easily re-use it across both Instance and Global Aggregates. Right now, we're duplicating the exact same logic across both, the only difference being their destination, the same documents are created, which is inefficent.

Additionally, should the logic need to be tweaked, we would have to do it to both, which is a maintainability issue.