This field is now redundant since the connection type field will indicate
MANUAL for addnode connections.
This is a backport of [[https://github.com/bitcoin/bitcoin/pull/19725 | core#19725]] [4/5]
https://github.com/bitcoin/bitcoin/pull/19725/commits/50f94b34a33c954f6e207f509c93d33267a5c3e2
Depends on D10373