Implement better batching

[Syriiin]

Why?

Batch calculations are very naive at the moment.
It effectively is the same process as doing single calculations, but using a single HTTP request.
In the case where there are many hits to the cache/recalculations of the same beatmap/mod, we are wasting a lot of effort.
This PR implement smarter batching by grouping scores by beatmap/mods and processing them in groups to share difficulty calculations.

Changes

• Update a bunch of deps
• Implement better batching
• Add test to ensure better batching doesn't break result ordering

Breaking changes

• Update CalculatorService.CalculateDifficultyAttributes method signature

- protected abstract (object, string) CalculateDifficultyAttributes(TScore score);
+ protected abstract (object, string) CalculateDifficultyAttributes(string beatmapId, int mods);