Can be reviewed with the git option --color-moved=dimmed-zebra
Also fix a if (user_message.empty()) clause which was previously negated by mistake (introduced in D8649). This caused the specific user message to be overwritten by a more generic and less useful message.
This is a backport of core#21575 [3/6]
https://github.com/bitcoin/bitcoin/pull/21575/commits/fa91b2b2b3447a3645e7958c7dc4e1946a69cb9c
Depends on D11348