This patch will slightly change the output of CMakeLists.txt files that
are generated for examples.
* set_target_properties() will no longer be added to the top-level
scope. If the WIN32 and MACOSX_BUNDLE properties should be added,
they will instead be added to qt_add_executable().
* The version in cmake_minimum_required() will now be 3.16, rather than
3.14.
Pick-to: 6.2
Change-Id: I79e1865dace5538d2b7ff264da02f9e28a655ae9
Reviewed-by: Alexandru Croitor <alexandru.croitor@qt.io>