[I] [Python] `replace_with_mask` crashes Python when null type inputs are used [arrow]

[via GitHub]

renaudb opened a new issue, #47447:
URL: https://github.com/apache/arrow/issues/47447

   ### Describe the bug, including details regarding any error messages, 
version, and platform.
   
   This was tested with pyarrow 21.0.0 and 20.0.0 and OSX and Linux.
   
   To reproduce:
   
   ```
   import pyarrow as pa
   import pyarrow.compute as pc
   
   a = pa.array([None], pa.null())
   b = pa.array([None], pa.null())
   pc.replace_with_mask(a, True, b)
   ```
   
   This was discovered when using pandas `combine_first` on null series.
   
   ```
   import pandas as pd
   import pyarrow as pa
   
   pd.Series([None], 
dtype=pd.ArrowDtype(pa.null())).combine_first(pd.Series([None], 
dtype=pd.ArrowDtype(pa.null())))
   ```
   
   ### Component(s)
   
   Python


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