rosetta: break cyclical dependency with cosmos-sdk

[tac0turtle]

Summary

Currently cosmos-sdk depends on rosetta (an external go.mod) and rosetta depends on Cosmos-sdk.

I believe we only need to break the sdk side and this is scoped to the server start command.

The problem arises with that rosetta is imported into the server package instead of passed in by the app.

[tac0turtle]

Talked with the team, we believe not having rosetta run as part of the node process is the best solution here. It breaks the dependency graph and removes operation of it from the node. Therefore it could be easier to maintain.