Better handling writing from drivers without geometry

[mwtoews]

Not all OGR drivers write geometries, e.g. CSV. This can cause a supprise while writing:

import fiona

schema = {"geometry": "Point", "properties": {"zero": "int"}}
feature = {
    "geometry": {"type": "Point", "coordinates": (0, 0)},
    "properties": {"zero": "0"},
}

with fiona.open("test.csv", "w", driver="CSV", schema=schema) as ds:
    ds.write(feature)

raises

Traceback (most recent call last):

  Cell In[274], line 5
    collection.write(feature)

  File ~\AppData\Local\miniforge3\envs\pyforge\lib\site-packages\fiona\collection.py:367 in write
    self.writerecords([record])

  File ~\AppData\Local\miniforge3\envs\pyforge\lib\site-packages\fiona\collection.py:361 in writerecords
    self.session.writerecs(records, self)

  File fiona\ogrext.pyx:1291 in fiona.ogrext.WritingSession.writerecs

  File fiona\ogrext.pyx:354 in fiona.ogrext.OGRFeatureBuilder.build

  File fiona\_err.pyx:269 in fiona._err.exc_wrap_int

FionaCPLError: The wrapped function returned an error code, but no error message was set.

which originates from: https://github.com/Toblerity/Fiona/blob/1.8.22/fiona/ogrext.pyx#L351-L354

The driver can be modified to enable a geometry with GEOMETRY="AS_WKT" added to the fiona.open example above to allow it to work as expected. A better handling would not try to write the geometry for the features.

This demo is with Fiona 1.8.22 from conda-forge on Windows, but similar happens with Linux too.