Have the sanity bot complain when using module-wide includes

It's never OK to use module-wide includes (e.g. #include <QtCore>), so Qt should never do that. This includes examples and autotests. The bot should flag any code that adds such an include.

The biggest offender is #include <QtTest> when one likelywanted to type #include <QTest>, accidentally including all of QtCore as a dependency.

When QtTest was purged out of qtbase, testcases build time was reduced by 25%, so that's absolutely significant. But I see that it got added (back?).