Decouple/refactor view, private, public data oracles (typescript)

[fcarreiro]

IIUC the TypedOracle class defines all possible kind of oracles that would then be used in view (unconstrained), private and public. If you look closely at the methods, then you see that some of them are just unimplemented in some of the contexts.

I think these 3 contexts may not need to be grouped under the same class since their needs are different.

There's no rush to do this, but it might be a good cleanup.

cc other teams: @nventuro @dbanks12 @sirasistant

[nventuro]

I think this is partially due to us slowly realizing what these different environments are and how they differ, and the TS classes not being properly updated to reflect that. We're now adding TXE (#6985) as a fourth environment that also implements this interface.

I'd recommend perfoming some review of the expectations of each environment before attemtping any refactors.