Fix an issue with one_level_list schemas in parquet reader.

[nvdbaranec]

Partially addresses: #10733

For a particular way of encoding list schemas (an old way that Spark seems to use sometimes), the parquet reader was accidentally propagating incorrect nesting information between columns. Just a simple bug of not popping an extra value off a stack.

Note: this is simply a fix so that the files read correctly, however the internal data in the file is actually of binary type and cudf converts these to string columns. This PR does not add support for binary as a real type in cudf.

[PointKernel]

LGTM. Thanks!

[mythrocks]

Thanks for explaining it to me, @nvdbaranec.

[mythrocks]

I realize there isn't a good way to test the readers without checking in the parquet file itself. :/

[nvdbaranec]

rerun tests

[codecov]

Codecov Report

Merging #10750 (005949b) into branch-22.06 (d6e3068) will increase coverage by 0.06%.
The diff coverage is n/a.

@@               Coverage Diff                @@
##           branch-22.06   #10750      +/-   ##
================================================
+ Coverage         86.36%   86.43%   +0.06%     
================================================
  Files               142      143       +1     
  Lines             22302    22444     +142     
================================================
+ Hits              19261    19399     +138     
- Misses             3041     3045       +4     

Impacted Files	Coverage Δ
python/dask_cudf/dask_cudf/io/parquet.py	92.39% <0.00%> (-1.40%)	⬇️
python/cudf/cudf/api/types.py	89.36% <0.00%> (-0.44%)	⬇️
python/cudf/cudf/core/dataframe.py	93.74% <0.00%> (-0.01%)	⬇️
python/cudf/cudf/core/frame.py	93.41% <0.00%> (ø)
python/cudf/cudf/core/index.py	92.31% <0.00%> (ø)
python/cudf/cudf/core/dtypes.py	97.30% <0.00%> (ø)
python/cudf/cudf/_lib/__init__.py	100.00% <0.00%> (ø)
python/cudf/cudf/testing/dataset_generator.py	73.25% <0.00%> (ø)
...ython/dask_cudf/dask_cudf/io/tests/test_parquet.py	100.00% <0.00%> (ø)
python/cudf/cudf/core/_internals/expressions.py	92.85% <0.00%> (ø)
... and 7 more

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[nvdbaranec]

@gpucibot merge