Update CI scripts to use cupy=8.5.0

[pentschev]

This PR attempts to resolve percentile test failures by updating CuPy dependency on CI build scripts to version 8.5.0, which includes cupy/cupy#4742 .

[codecov]

Codecov Report

Merging #7615 (828ef8d) into branch-0.19 (7871e7a) will increase coverage by 0.54%.
The diff coverage is 93.75%.

❗ Current head 828ef8d differs from pull request most recent head ab77086. Consider uploading reports for the commit ab77086 to get more accurate results

@@               Coverage Diff               @@
##           branch-0.19    #7615      +/-   ##
===============================================
+ Coverage        81.86%   82.41%   +0.54%     
===============================================
  Files              101      101              
  Lines            16884    17353     +469     
===============================================
+ Hits             13822    14301     +479     
+ Misses            3062     3052      -10     

Impacted Files	Coverage Δ
python/cudf/cudf/core/index.py	93.34% <ø> (+0.48%)	⬆️
python/cudf/cudf/core/column/numerical.py	94.83% <87.50%> (-0.20%)	⬇️
python/cudf/cudf/core/frame.py	89.09% <89.47%> (+0.08%)	⬆️
python/cudf/cudf/core/column/column.py	87.86% <90.00%> (+0.10%)	⬆️
python/cudf/cudf/core/column/decimal.py	92.75% <90.32%> (-2.12%)	⬇️
python/cudf/cudf/core/dataframe.py	90.58% <95.65%> (+0.11%)	⬆️
python/cudf/cudf/core/series.py	91.57% <95.83%> (+0.79%)	⬆️
python/cudf/cudf/core/column/categorical.py	91.97% <100.00%> (+0.58%)	⬆️
python/cudf/cudf/core/column/datetime.py	89.63% <100.00%> (+0.54%)	⬆️
python/cudf/cudf/core/column/string.py	86.76% <100.00%> (+0.26%)	⬆️
... and 55 more

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[kkraus14]

Fixed by rapidsai/integration#230