Handling GDAL version

[THEvang]

The version of gdal installed by the system package manager, for instance apt, is not always compatible with the gdal Python bindings installed by pip. Currently, pip install the latest version of the gdal bindings which at the time of writing is 3.9.0 and the system version is 3.4.1 on Ubuntu 22.04.

One solution is to lock the version of gdal in setup.cfg and refer the user to building the correct version of gdal from source or downloading pre-built binaries if they exist:

https://gdal.org/development/building_from_source.html