Use address descriptors instead of paths in utxo structures

[landabaso]

In order to make it a smooth transition:

1. Create a descriptor property and put in there a serialized json object including path, witnessScript and/or redeemScript. Now change all functions names from DerivationPath or Path to Descriptor.
2. then start using: wsh(raw(HEX)), wsh(raw(HEX))or sh(wsh(raw(HEX)) for FARVAULT transactions.
3. On a final phase, use miniscript, descriptors...

https://github.com/bitcoin/bitcoin/blob/master/doc/descriptors.md