DOCS-#6416: fix import path for spreadsheet feature

[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 BUG: No module named 'modin.spreadsheet' #6416
• tests added and passing
• module layout described at docs/development/architecture.rst is up-to-date

[anmyachev]

@mvashishtha could you make new release of modin[spreadsheet]? Then we can upgrade the pin in Modin to a working version.

[mvashishtha]

@anmyachev I can make a release, but do we need a release before merging this PR?

[anmyachev]

@anmyachev I can make a release, but do we need a release before merging this PR?

no, firstly - new release of https://github.com/modin-project/modin-spreadsheet. Then we will update pin in modin something like:

spreadsheet_deps = ["modin-spreadsheet>=0.1.3"] (instead of >=0.1.0)

At the end we will release Modin itself (with updated pin).

[anmyachev]

@anmyachev I can make a release, but do we need a release before merging this PR?

@mvashishtha what about making a release of modin-spreadsheet? Do you have time for that?