TEST-#6868: Remove tests for 'gs' remote protocol since Modin rely on 'fsspec'

[anmyachev]

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 Missed gcsfs dependency in CI #6868
• tests added and passing
• module layout described at docs/development/architecture.rst is up-to-date

[YarShev]

Do I understand correctly that we have the same code path both for s3 and gs and we rely on fsspec with respect to it has proper testing for both protocols?

[anmyachev]

Do I understand correctly that we have the same code path both for s3 and gs and we rely on fsspec with respect to it has proper testing for both protocols?

Exactly