FIX-#6781: Use pandas.api.types.pandas_dtype to convert to valid numpy and pandas only dtypes

[JignyasAnand]

What do these changes do?

• first commit message and PR title follow format outlined here

  NOTE: If you edit the PR title to match this format, you need to add another commit (even if it's empty) or amend your last commit for the CI job that checks the PR title to pick up the new PR title.

• 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 TypeError: data type 'Int64' not understood #6781
• tests added and passing
• module layout described at docs/development/architecture.rst is up-to-date

[anmyachev]

@JignyasAnand thanks for the contribution! Could you also add a test using code from the issue somewhere around?

modin/modin/pandas/test/dataframe/test_reduce.py

Line 287 in 2fee144

def test_sum(data, axis, skipna, is_transposed):

[JignyasAnand]

Hi @anmyachev . I have added the tests. Can you take a look at them?

[anmyachev]

LGTM!

[anmyachev]

Thanks @JignyasAnand!