Migrate nullifier tree to `LargeSmt` + `RocksDB`

[drahnr]

Similarly to AccountTree, we need to provide an API that is generic over the Smt implementation. The main part will be in miden-base, the integration piece will be in miden-node.

[bobbinth]

We may need to do a part of this in miden-base - similar to how we updated AccountTree.

[bobbinth]

@drahnr - this is done, right?