Support `VectorCube` type as `spatial_extent` in `load_collection`

[VincentVerelst]

I get an error when providing vector data as spatial_extent in load_collection:

{'loadurl1': {'process_id': 'load_url',
  'arguments': {'format': 'Parquet',
   'url': 'https://artifactory.vgt.vito.be/artifactory/auxdata-public/gfmap/32736-random-points.geoparquet'}},
 'loadcollection1': {'process_id': 'load_collection',
  'arguments': {'bands': ['NDVI_10M'],
   'id': 'TERRASCOPE_S2_NDVI_V2',
   'spatial_extent': {'from_node': 'loadurl1'},
   'temporal_extent': ['2022-05-01', '2022-05-30']},
  'result': True}}

This process graph results in OpenEoApiError: [500] Internal: Server error: AttributeError("'DriverVectorCube' object has no attribute 'get'")

It's not a blocking issue for me, as there is an easy workaround, by just omitting the spatial_extent in load_collection. However, could we already provide a clearer error message in the meantime?

CC: @Pratichhya

[EmileSonneveld]

@VincentVerelst , do you have a job-id or request ID?
Otherwise the probably stack trace is:

  File "/opt/venv/lib64/python3.8/site-packages/openeo_driver/ProcessGraphDeserializer.py", line 747, in load_collection
    arguments["spatial_extent"] = _extract_bbox_extent(
  File "/opt/venv/lib64/python3.8/site-packages/openeo_driver/ProcessGraphDeserializer.py", line 1464, in _extract_bbox_extent
    if handle_geojson and extent.get("type") in [
AttributeError: 'DriverVectorCube' object has no attribute 'get'

[VincentVerelst]

@EmileSonneveld, j-25032012233243e4b07404b15f1a26a8 on Terrascope