Add hooks for `PySide6.QtLocation` and `PySide6.QtSerialBus` that
are available in 6.5.0, and update corresponding module definitions.

Also mark `QtPositioning` python module as available on all bindings,
since that seems to be the case (and has been for a while?).

As a side note, the preview of `PyQt6` 6.5.0 does not seem to
provide `QtLocation` nor `QtSerialBus` python modules (nor the
corresponding Qt shared libraries), so no change need to be made
for `PyQt6` yet.

Add dynamic check for SSL support, and skip the test if it is not
available (e.g., `QtNetwork` in `PySide6` 6.5.0 requires OpenSSL 3,
which is unavailable on `ubuntu-20.04` GA runner).

Also, have the test instantiate `QCoreApplication` to avoid a
warning.

The python module for QtTextToSpeech seems to be added in
PyQt6 6.4.0 and PySide6 6.5.0. The hooks ensure that plugins
are collected.

PySide6 6.5.0 PyPI wheels seem to be missing `opengl32sw.dll`,
which causes `QtWebEngine` applications in virtualized environments
to crash due to failure to initialize OpenGL context.

Looks like passing an empty list is causing problems with QtWebEngine
in PyQt6 6.5.0. And even if we can get away with it in other tests
and with other bindings, it makes more sense to properly pass
`sys.argv`, as one would in a real application. Applies to all
instantiations of `QCoreApplication`, `QGuiApplication`, and
`QApplication`.

Instantiate `QCoreApplication` with `sys.argv` instead of an empty
list to avoid potential issues in the future.

The python module for QtSpatialAudio was added in PyQt6 6.5.0.