Extend Python extensions - QIODevice and QAudioFormat

It was noticed that the https://doc.qt.io/qt-6/qiodevice.html#writeData and https://doc.qt.io/qt-6/qaudioformat.html#normalizedSampleValue were not exposed to Python because they both take const char* for the first parameter. Shiboken was let to generate bindings on its own for these two functions and hence they were not working properly.

Fix:

Instead of const char* use PyBuffer in the binding wrapper code.