Autogen: Move repeated tests to new QtAutogenRerun test

By moving QtAutogen tests that run repeatedly to a new QtAutogenRerun test, the ctest -R Qt[45]Autogen -j4 call runs approximately 25% faster.

This adds the new Qt[45]AutogenRerun tests to the CMake tests suite and moves test scripts that are run repeatedly from Qt[45]Autogen to Qt[45]AutogenRerun. The reason is to allow parallel processing of the Qt tests to decreases the total run time of the CMake tests suite.