interfaces: Remove unused getDefaultChangeType
https://github.com/bitcoin/bitcoin/pull/19396/commits/fa2eb383522249a5f4d48726c520cec5de496614
Remove confusing OutputType::CHANGE_AUTO
https://github.com/bitcoin/bitcoin/pull/19396/commits/faddad71f648ed99734f4f8811bd4bc7232ca670
Enable Wswitch for OutputType
https://github.com/bitcoin/bitcoin/pull/19396/commits/fa927ff884ae373c676deed63180a8d238872cdc
This is a backport of core#19396