Merge #18855: tests: feature_backwards_compatibility.py test downgrade after upgrade
489ebfd7a16443d8263c048d55622da297df7c39 tests: feature_backwards_compatibility.py test downgrade after upgrade (Andrew Chow)
Pull request description:
After upgrading the node, try to go back to the original version to make sure that using a newer node version does not prevent the wallet file from being downgraded again.
ACKs for top commit: