Add QT_LOGGING_TO_CONSOLE to env by default

Qt Creator starts Qt/QML apps without terminal by default, and that may stop it from receiving and displaying to the programmer stdout/stderr of the app which is being developed/debugged.

The root cause is a set of heuristics[1] and integrations with platform-specific system journals, but a universal workaround is to set QT_LOGGING_TO_CONSOLE environment variable.

Dear Qt Creator, please, be integrated with things you are supposed to help to develop, at least somehow a little. Set this QT_LOGGING_TO_CONSOLE by default for all new projects (and maybe for existing ones too).

[1]: https://www.mail-archive.com/development@qt-project.org/msg16578.html
Related:
[2]: https://bugreports.qt.io/browse/QTCREATORBUG-24756
[3]: https://bugreports.qt.io/browse/QTCREATORBUG-12564