Pin arrow 9 in testing dependencies to prevent conda solve issues

[vyasr]

Description

This pinning is necessary because other testing dependencies require arrow (currently, transformers has a transitive dependency on it) and don't include a pinning as strict as ours, resulting in a newer arrow package (arrow 10) being installed. When we attempt to install our cudf/libcudf packages in CI, it should be able to downgrade to arrow 9, but the downgrade fails because changes in arrow's package structure in arrow 10 include the creation of a new libarrow package (arrow-cpp was renamed to libarrow) and libarrow has no equivalent in arrow 9. As a result, conda does not see a way to downgrade it, and it also does not see a way to satisfy its dependencies if the rest of the arrow packages are downgraded to arrow 9 (because libarrow is tied to arrow 10 packages), so the conda solve fails.

The current changeset will fix Github Actions CI. We may need additional fixes in our Jenkins CI.

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: 86.57% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (8b097b5) compared to base (b6dccb3).
Patch has no changes to coverable lines.

❗ Current head 8b097b5 differs from pull request most recent head 88600c4. Consider uploading reports for the commit 88600c4 to get more accurate results

Additional details and impacted files

@@               Coverage Diff                @@
##           branch-23.02   #12377      +/-   ##
================================================
- Coverage         86.58%   86.57%   -0.01%     
================================================
  Files               155      155              
  Lines             24368    24517     +149     
================================================
+ Hits              21098    21225     +127     
- Misses             3270     3292      +22     

Impacted Files	Coverage Δ
python/cudf/cudf/core/buffer/spill_manager.py	74.37% <0.00%> (-5.63%)	⬇️
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%)	⬇️
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%)	⬇️
python/cudf/cudf/core/dataframe.py	93.50% <0.00%> (-0.09%)	⬇️
python/cudf/cudf/core/join/_join_helpers.py	98.52% <0.00%> (-0.07%)	⬇️
python/dask_cudf/dask_cudf/tests/test_core.py	95.42% <0.00%> (-0.02%)	⬇️
... and 29 more

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[bdice]

Thanks for the fix. Note that this should be resolved by #12327.

[vyasr]

@ajschmidt8 As expected, we'll need to do something similar to fix this for gpuCI (or we can simply disable gpuCI at this point!).

[ajschmidt8]

LGTM. I added a quick workaround that should hopefully work for Jenkins. But yes, we will soon disable Jenkins at which point those scripts will be removed entirely.

[ajschmidt8]

@gpucibot merge