Deprecate chunksize from dask_cudf.read_csv

[rjzamora]

Description

Deprecates chunksize in favor of blocksize to be consistent with dask.dataframe.read_csv.

Closes #11847

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: 85.67% // Head: 85.67% // Decreases project coverage by -0.00% ⚠️

Coverage data is based on head (a540419) compared to base (126829c).
Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

@@               Coverage Diff                @@
##           branch-23.02   #12394      +/-   ##
================================================
- Coverage         85.67%   85.67%   -0.01%     
================================================
  Files               155      155              
  Lines             24812    24818       +6     
================================================
+ Hits              21258    21263       +5     
- Misses             3554     3555       +1     

Impacted Files	Coverage Δ
python/dask_cudf/dask_cudf/backends.py	85.32% <100.00%> (+0.15%)	⬆️
python/dask_cudf/dask_cudf/io/csv.py	96.34% <100.00%> (-1.00%)	⬇️
python/dask_cudf/dask_cudf/io/tests/test_csv.py	100.00% <100.00%> (ø)
python/cudf/cudf/core/column/categorical.py	89.46% <0.00%> (-0.22%)	⬇️

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[wence-]

Looks good.

[rapids-bot]

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

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

[rjzamora]

/merge