PR: Skip QtPositioning tests on Conda Qt >=6.4.3 where its not included

[CAM-Gerlach]

As discovered in PR #413 , as of the release of qt-main 6.4.3 on Conda-Forge (conda-forge/qt-main-feedstock#135), the Qt6 Conda jobs are failing because QtPositioning is no longer included in qt-main as of 6.4.3, along with the other QSensors stuff for device sensors.

Therefore, I just went ahead and skipped the test on QT6 and conda. It might be nice to be able to actually check the version, though for that we really should do a proper version comparison on the QT_VERSION (for which it would be a good idea to parse it and the other versions in __init__ to "version_info"-style version tuples, e.g. under QT_VERSION_INFO and similar, which might be more generally useful to users and ourselves. However, since that would be a slightly less trivial change, I deferred that until getting your feedback on it.

[dalthviz]

Thanks @CAM-Gerlach ! LGTM 👍

As a side note, regarding the QT_VERSION parsing that sounds like a good idea 👍 Although I'm not sure if that should be done for at least a minor release 🤔 , maybe creating an issue to track the idea would be good (so we can get more feedback first).

[CAM-Gerlach]

As a side note, regarding the QT_VERSION parsing that sounds like a good idea +1 Although I'm not sure if that should be done for at least a minor release thinking , maybe creating an issue to track the idea would be good (so we can get more feedback first).

Thanks; opened as #415