fix(python): wrong batch size

[ion-elgreco]

Description

Was passing the wrong param

• closes delta_rs don't seems to respect the row group size #2309

[rtyler]

I'm struggling to understand this change and how it relates to the issue, I don't see how WriterProperties are sent in the Rust writer, or how removing this argument fixes things, maybe it just clears up confusion?

The write_deltalake function still has this parameter but I'm also not understanding why 😆

[ion-elgreco]

@rtyler when I built the rust engine on the python side, I misinterpreted the max row group size as the batch size.

The actual max_batch_size and max_row_group_size can be set with the python WriterProperies class.
It's confusing because we are still supporting both pyarrow and rust engines

[wjones127]

Is there a test on the current Rust writer for max_rows_per_group? Is it being set through writer_properties: Option<HashMap<String, Option<String>>>,?

[ion-elgreco]

@wjones127 There are some tests here: https://github.com/delta-io/delta-rs/blob/main/python/tests/test_writerproperties.py.

Setting the max_row_group_size inside WriterProperties works fine, see here: #2309 (comment).

I just by accident pass max_rows_per_group which is used for the pyarrow writer to parquet::write_batch_size, which is something different : P