Support migration of data to databases other than leveldb

[derekadams]

Summary

The current configuration for provenanced primarily supports leveldb which is starting to show performance issues at scale. Add support for migrating existing leveldb data to other databases supported by Cosmos/Tendermint (e.g. rocksdb, badgerdb) so that we can properly test performance characteristics across database backends.

Problem Definition

What problems may be addressed by introducing this feature?
Issues with slow node start-up/catch-up times as well as general processing performance.

What benefits does the Provenance Network stand to gain by including this feature?
Better experience for node operators, faster recovery when bootstrapping from quicksync, and generally improved performance.

Proposal

Create a new binary that sits on top of the tm-db database libraries which allows database information to be migrated from one type to another.

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