cpp: Fix GenCardKeyInteractor and extend it
* NEWS: Mention interface change. * lang/cpp/src/gpggencardkeyinteractor.cpp (GpgGenCardKeyInteractor::setAlgo): New. (GpgGenCardKeyInteractor::action), (GpgGenCardKeyInteractor::nextState: Handle new interface.
Tested that this workes with the old interface of GnuPG 2.2.5
and the new interface since GnuPG 2.2.6
- GnuPG-Bug-Id: T4428