Cross check that all modules are verified with the Highlighted examples

Define a way to do a cross check that if all of the highlighted examples are tested, it will cover all Qt modules.

• Find out how to see which Qt modules each highlighted example uses
• Create list of covered modules
• compare to the full list of module in Qt

Analyze, is it sensible to create an RTA test of this check, or is manual check once in a while (once for each Qt release?) enough.

Supported modules listed in https://www.qt.io/blog/qt-roadmap-for-2021