- Add builtin.EthereumAddressManagerActorAddr to builtin.go.template and make jen
- Rename to EthereumAddressManagerActorAddr to match pattern of other actors (CronActorAddr/etc)
1. Move lock, loading, etc into GetFilVested.
2. Call it directly when creating the FVM.
3. Detach GetFilLocked from state manager.
Really, this just makes it a bit easier to reason about this code.