Apart from being consistent with qtpaths (which uses qVersion()),
this also ensures that Qt Creator loads correct debug helpers for types
like QString when debugging qmake.
As a drive by, remove all QT_VERSION_MAJOR, QT_VERSION_MINOR,
QT_VERSION_PATCH defines which are not used anywhere.
Change-Id: Ibc8f2a6af833e1ec6e6cd6e1937ac3c1ab328555
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Jörg Bornemann <joerg.bornemann@qt.io>
a783c3d574