Merge bitcoin/bitcoin#12677: RPC: Add ancestor{count,size,fees} to listunspent output

6cb60f3e6d doc/release-notes: Add new listunspent fields (Luke Dashjr)
0be2f17ef5 QA: Add tests for listunspent ancestor{count,size,fees} to mempool_packages (Luke Dashjr)
6966e80f45 RPC: Add ancestor{count,size,fees} to listunspent output (Luke Dashjr)
3f77dfdaf0 Expose ancestorsize and ancestorfees via getTransactionAncestry (Luke Dashjr)

Pull request description:

  Requested by a user

ACKs for top commit:
  prayank23:
    reACK https://github.com/bitcoin/bitcoin/commit/6cb60f3e6d652ffa4cf570426a7cf1f690d15c45
  fjahr:
    Code review re-ACK 6cb60f3e6d
  kiminuo:
    ACK [6cb60f3](https://github.com/bitcoin/bitcoin/commit/6cb60f3e6d652ffa4cf570426a7cf1f690d15c45)
  achow101:
    Code Review ACK 6cb60f3e6d
  naumenkogs:
    ACK 6cb60f3e6d
  darosior:
    utACK 6cb60f3e6d

Tree-SHA512: 5d16e5799558691e5853ab7ea2cc85514cb45da3ce69134d855c71845beef32ec6af5ab28d4462683e9800c8ea126f162773a9d3d5660edac08fd8edbfeda173

doc/release-notes-12677.md

@@ -0,0 +1,8 @@
+Notable changes
+===============
+
+Updated RPCs
+------------
+
+- `listunspent` now includes `ancestorcount`, `ancestorsize`, and
+`ancestorfees` for each transaction output that is still in the mempool.