[Feat] t.vect.export: Support QGIS compatile GPKG export and drop hardcoded GRASS Version

[ninsbl]

Is your feature request related to a problem? Please describe.
Currently, GRASS GIS exports temporal data to GeoPackage with one file per vector map layer.
STVDS could be exported as single Geopackage either with all features in one table, and time as an attribute or one table per timestamp.

Further more, the major version of GRASS GIS is hardcoded in messges. It should be fetched dynamically on runtime...
https://github.com/OSGeo/grass/blob/main/python/grass/temporal/stds_export.py#L444

Finally, old string formating can be replaced by f-strings