REFACTOR-#4774: remove _build_treereduce_func call from _compute_dtypes

[anmyachev]

Signed-off-by: Myachev anatoly.myachev@intel.com

What do these changes do?

• 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 REFACTOR: remove _build_treereduce_func call from _compute_dtypes #4774
• 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]

Codecov Report

Merging #4775 (34cb486) into master (a28e319) will increase coverage by 4.50%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #4775      +/-   ##
==========================================
+ Coverage   85.29%   89.80%   +4.50%     
==========================================
  Files         259      260       +1     
  Lines       19346    19627     +281     
==========================================
+ Hits        16502    17626    +1124     
+ Misses       2844     2001     -843     

Impacted Files	Coverage Δ
modin/core/dataframe/pandas/dataframe/dataframe.py	94.32% <100.00%> (-0.02%)	⬇️
...ecution/ray/implementations/pandas_on_ray/io/io.py	80.37% <0.00%> (-7.48%)	⬇️
modin/db_conn.py	94.28% <0.00%> (-2.86%)	⬇️
modin/core/storage_formats/pandas/parsers.py	88.92% <0.00%> (-1.54%)	⬇️
modin/logging/config.py	94.59% <0.00%> (-1.30%)	⬇️
modin/experimental/batch/test/test_pipeline.py	100.00% <0.00%> (ø)
modin/pandas/series.py	94.33% <0.00%> (+0.24%)	⬆️
modin/pandas/series_utils.py	99.43% <0.00%> (+0.56%)	⬆️
modin/core/io/text/excel_dispatcher.py	94.01% <0.00%> (+0.85%)	⬆️
...ns/pandas_on_ray/partitioning/partition_manager.py	82.19% <0.00%> (+1.36%)	⬆️
... and 35 more

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[YarShev]

@anmyachev, good catch, thanks!