Clone Boot2Qt Kits automatically on QtC startup

As a new a Qt Auto developer, I want to start using Qt Creator with minima, ideally none at all, manual configuration steps. Currently, the autodetected kits for Qt Automotive Suite are hard-linked into Boot2Qt-based device types. This makes it not possible to use a Generic Linux Device with that kits. A solution would be to automatically clone those kits on the first QtC start, but still male them usable with Generic Linux Device types. Basically automate most of the steps listed https://doc.qt.io/qtcreator/creator-developing-qtasam.html#add-kits-for-qt-application-manager-devices

implementation: https://codereview.qt-project.org/c/qt-creator/pcore-plugin-appman/+/268586