FEAT-#0000: Set ray to 2.0.0rc0 for CI testing

[pyrito]

What do these changes do?

This PR is just testing our tests with Ray 2.0.0rc0.

• [ ] commit message follows format outlined here
• [ ] passes flake8 modin/ asv_bench/benchmarks scripts/doc_checker.py
• [ ] passes black --check modin/ asv_bench/benchmarks scripts/doc_checker.py
• [ ] signed commit with git commit -s
• [ ] Resolves #?
• [ ] tests added and passing
• [ ] module layout described at docs/development/architecture.rst is up-to-date
• [ ] added (Issue Number: PR title (PR Number)) and github username to release notes for next major release

[codecov[bot]]

Codecov Report

Merging #4744 (9ebeed0) into master (05bf659) will increase coverage by 4.48%. The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #4744      +/-   ##
==========================================
+ Coverage   85.26%   89.74%   +4.48%     
==========================================
  Files         259      260       +1     
  Lines       19218    19609     +391     
==========================================
+ Hits        16386    17599    +1213     
+ Misses       2832     2010     -822     

Impacted Files	Coverage Δ
modin/experimental/xgboost/test/test_default.py	70.00% <0.00%> (-30.00%)	:arrow_down:
...s/pandas_on_dask/partitioning/virtual_partition.py	74.76% <0.00%> (-11.22%)	:arrow_down:
...entations/pandas_on_dask/partitioning/partition.py	84.14% <0.00%> (-4.88%)	:arrow_down:
...n/core/io/column_stores/column_store_dispatcher.py	96.00% <0.00%> (-4.00%)	:arrow_down:
modin/logging/config.py	94.59% <0.00%> (-1.30%)	:arrow_down:
modin/experimental/xgboost/xgboost.py	86.66% <0.00%> (-0.96%)	:arrow_down:
modin/core/storage_formats/pandas/utils.py	100.00% <0.00%> (ø)
modin/experimental/batch/test/test_pipeline.py	100.00% <0.00%> (ø)
modin/core/io/column_stores/parquet_dispatcher.py	97.05% <0.00%> (+0.08%)	:arrow_up:
modin/core/storage_formats/pandas/parsers.py	90.46% <0.00%> (+0.24%)	:arrow_up:
... and 36 more

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[pyrito]

       before           after         ratio
     [05bf659b]       [9ebeed08]
     <master~4>                 
+         955±8μs       1.23±0.2ms     1.29  omnisci.benchmarks.TimeIndexing.time_iloc([10000, 10], 'numpy_array_take_all_values')
+        14.9±2ms         18.5±3ms     1.24  benchmarks.TimeArithmetic.time_abs([250, 250], 1)
-        200±60ms         79.0±2ms     0.39  benchmarks.TimeArithmetic.time_mode([250, 250], 1)

[pyrito]

Closing this PR since it's no longer needed. Ray 2.0.0 has been officially released and we seem to be handling it well in CI.