[Python][CI] Substrait nightly job is failing due to wrong invocation of substrait consumer-testing

[raulcd]

Describe the bug, including details regarding any error messages, version, and platform.

The test-conda-python-3.10-substrait job is currently failing with:

 UsageError: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: argument --producer: invalid choice: 'IsthmusProducer' (choose from 'datafusion', 'duckdb', 'ibis', 'isthmus')
For more information see https://pluggy.readthedocs.io/en/stable/api_reference.html#pluggy.PluggyTeardownRaisedWarning
  config = pluginmanager.hook.pytest_cmdline_parse(
ERROR: usage: pytest [options] [file_or_dir] [file_or_dir] [...]
pytest: error: argument --producer: invalid choice: 'IsthmusProducer' (choose from 'datafusion', 'duckdb', 'ibis', 'isthmus')

This seems to be related to this substrait consumer-testing PR change:

• feat: make producer and consumer CLI arguments nicer substrait-io/consumer-testing#124

Component(s)

Continuous Integration, Python