Read GeoParquet files using parquet reader
Let GeoParquet files with the file extension `*.geoparquet` or `*.gpq` be readable by the default parquet reader.

Those two file extensions are the ones most commonly used for GeoParquet files, and is included in the `gpq` validator tool at https://github.com/planetlabs/gpq/blob/e5576b4ee7306b4d2259d56c879465a9364dab90/cmd/gpq/command/convert.go#L73-L75

Addresses https://github.com/huggingface/datasets/issues/6438