convert all remaining serializations to new style
This converts all Bitcoin ABC serializations that were not converted by
ninja all check-all
Build an avalanche proof with bitcoin-cli buildavalancheproof ... and verify the result hasn't changed.
Reviewers: #bitcoin_abc, Fabien
Reviewed By: #bitcoin_abc, Fabien
Differential Revision: https://reviews.bitcoinabc.org/D9247