Deprecation related to Polars 1.32's new Categorical/Enum implementation

[Dev-iL]

When running import pandera.polars as pa with polars 1.32 installed, the below deprecation warning is raised:

    import pandera.polars as pa
..\.venv\Lib\site-packages\pandera\polars.py:11: in <module>
    from pandera.api.polars.components import Column
..\.venv\Lib\site-packages\pandera\api\polars\components.py:15: in <module>
    from pandera.engines import polars_engine
..\.venv\Lib\site-packages\pandera\engines\polars_engine.py:730: in <module>
    @Engine.register_dtype(equivalents=[pl.Categorical])
     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
..\.venv\Lib\site-packages\pandera\engines\engine.py:217: in _wrapper
    cls._register_equivalents(pandera_dtype_cls, *equivalents)
..\.venv\Lib\site-packages\pandera\engines\engine.py:160: in _register_equivalents
    pandera_dtype = pandera_dtype_cls()  # type: ignore
                    ^^^^^^^^^^^^^^^^^^^
..\.venv\Lib\site-packages\pandera\engines\polars_engine.py:744: in __init__
    object.__setattr__(self, "type", pl.Categorical(ordering=ordering))
                                     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
..\.venv\Lib\site-packages\polars\datatypes\classes.py:796: in __init__
    issue_deprecation_warning(
..\.venv\Lib\site-packages\polars\_utils\deprecation.py:61: in issue_deprecation_warning
    issue_warning(message, DeprecationWarning)
..\.venv\Lib\site-packages\polars\_utils\various.py:494: in issue_warning
    warnings.warn(
E   DeprecationWarning: the physical Categorical ordering is deprecated. The ordering is now always lexical.
E   (Deprecated in version 1.32.0)

This is related to https://github.com/pola-rs/polars/pull/23016.

• [x] I have checked that this issue has not already been reported.
• [x] I have confirmed this bug exists on the latest version of pandera.
• [x] (optional) I have confirmed this bug exists on the main branch of pandera.

Note: Please read this guide detailing how to provide the necessary information for us to reproduce your bug.

Code Sample, a copy-pastable example

# pip install "polars>=1.32" --upgrade
import pandera.polars as pa

Expected behavior

The import should succeed without deprecations.

[leycec]

Bump! Just hit this while attempting to author a unit test for @beartype's pandera.polars support over at beartype/beartype#557, @cosmicBboy. It's not a super-big deal at the moment, because unit test warnings are easily ignorable. Still, it's... kinda concerning.

This will definitely rupture and implode at some point. And @beartype doesn't want to be standing there when the fireworks start. 😅