bug: remove dependency on `pyarrow-hotfix`

[coady]

What happened?

pyarrow-hotfix is required even if the pyarrow in use is >=14.0.1, where it's already fixed. That import could be conditional or - given the age of ~3 years - maybe it's been long enough to bump the minimal arrow from 10 to 14 anyway?

It's noticeable when not using ibis-framework[duckdb], because I don't want the pandas dependency.

What version of ibis are you using?

12.0.0

What backend(s) are you using, if any?

duckdb with pyarrow (only)

Relevant log output

.venv/lib/python3.14/site-packages/ibis/backends/duckdb/__init__.py:1396, in Backend.to_pyarrow(self, expr, params, limit, **kwargs)
   1387 def to_pyarrow(
   1388     self,
   1389     expr: ir.Expr,
   (...)   1394     **kwargs: Any,
   1395 ) -> pa.Table:
-> 1396     from ibis.backends.duckdb.converter import DuckDBPyArrowData
   1398     table = self._to_duckdb_relation(
   1399         expr, params=params, limit=limit, **kwargs
   1400     ).to_arrow_table()
   1401     return expr.__pyarrow_result__(table, data_mapper=DuckDBPyArrowData)

ImportError: cannot import name 'DuckDBPyArrowData' from 'ibis.backends.duckdb.converter' (.venv/lib/python3.14/site-packages/ibis/backends/duckdb/converter.py)

    import pyarrow as pa
>   import pyarrow_hotfix  # noqa: F401
    ^^^^^^^^^^^^^^^^^^^^^
E   ModuleNotFoundError: No module named 'pyarrow_hotfix'

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