Remove arguments for checking exception messages in Python

[vyasr]

Description

This PR removes support for checking exception messages from assert_exceptions_equal. See #12076 for the same change made in C++, #10200 for more context, and #7917 for the change in cudf Python's developer documentation where we officially changed our policy to not consider exception payloads part of the stable API.

Checklist

• I am familiar with the Contributing Guidelines.
• New or existing tests cover these changes.
• The documentation is up to date with these changes.

[codecov]

Codecov Report

Base: 86.58% // Head: 85.70% // Decreases project coverage by -0.87% ⚠️

Coverage data is based on head (83829c9) compared to base (b6dccb3).
Patch has no changes to coverable lines.

Additional details and impacted files

@@               Coverage Diff                @@
##           branch-23.02   #12424      +/-   ##
================================================
- Coverage         86.58%   85.70%   -0.88%     
================================================
  Files               155      155              
  Lines             24368    24793     +425     
================================================
+ Hits              21098    21250     +152     
- Misses             3270     3543     +273     

Impacted Files	Coverage Δ
python/cudf/cudf/_version.py	1.41% <0.00%> (-98.59%)	⬇️
python/cudf/cudf/core/buffer/spill_manager.py	72.50% <0.00%> (-7.50%)	⬇️
python/cudf/cudf/core/buffer/spillable_buffer.py	90.04% <0.00%> (-2.81%)	⬇️
python/cudf/cudf/utils/dtypes.py	77.77% <0.00%> (-1.69%)	⬇️
python/cudf/cudf/options.py	86.11% <0.00%> (-1.59%)	⬇️
python/cudf/cudf/core/single_column_frame.py	94.30% <0.00%> (-1.27%)	⬇️
...ython/custreamz/custreamz/tests/test_dataframes.py	98.38% <0.00%> (-1.01%)	⬇️
python/dask_cudf/dask_cudf/io/parquet.py	91.81% <0.00%> (-0.59%)	⬇️
python/cudf/cudf/core/multiindex.py	91.66% <0.00%> (-0.51%)	⬇️
python/cudf/cudf/core/algorithms.py	90.00% <0.00%> (-0.48%)	⬇️
... and 36 more

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[vyasr]

@gpucibot merge

[rapids-bot]

@vyasr, the @gpucibot merge command has been replaced with /merge.

Please re-comment this PR with /merge and use this new command in the future.

[vyasr]

/merge