The naming of `LookupID` can cause confusion when resolving actor IDs vs
ID addresses. To avoid this:
* Refactor `StateTree` `LookupID` to `LookupIDAddress`, because it
returns ID address.
* Refactor `StateManager` `LookupID` to
`LookupIDAddress` because it also returns ID address via a chain call to
`StateTree`.
* Introduce a new API `StateManager` dedicated to resolving address to
actor ID, called `LookupID` which returns `abi.ActorID`.
For context, see:
* https://github.com/filecoin-project/lotus/pull/11723#discussion_r1534728607
