[Sustainability] Refactor game info platform type

[BrettCleary]

We should condense all of our platform strings on game info into shared ones across all game stores (separate PR). Right now we have a leaky abstraction with different store naming conventions for platforms propagating everywhere throughout the app.

We should define a common interface for stores and enforce all stores to meet this standard the store specific naming would only be used within each store manager in that case. I think we probably only need "Windows, Linux, macOS or Browser" and the _amd64 etc can be inferred by the current arch with a storeManager internal helper function