auction: connect auction component to application (#4259)

This PR adds:
- auction genesis content to the application state
- auction parameters to the application state (and governance update
logic)
- connects the app ABCI implementation to the auction's component
interface

- [x] If this code contains consensus-breaking changes, I have added the
"consensus-breaking" label. Otherwise, I declare my belief that there
are not consensus-breaking changes, for the following reason:

  > This is consensus breaking