refactor: remove Update.{Edited, NonChannel, Channel} through inlining

[KnorpelSenf]

They serve no real purpose. The fact that these values exist mostly is an artefact from a previous way of structuring the Bot API types in TS.

[KnorpelSenf]

As a matter of fact, they do serve a purpose, and removing them is not as easy as I expected. However, I still want to do this because I dislike the name clashes of namespaces and interfaces if the namespaces only hold internal properties. I think this works quite fine for chats etc but I don't want to keep on doing this for unspecified records such as it is done for updates.