TEST-#7643: Fix residual failures from pandas 2.3

[sfc-gh-joshi]

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 TEST: CI is broken at main #7643
• tests added and passing
• module layout described at docs/development/architecture.rst is up-to-date

2 failures are fixed here:

• DataFrame.insert apparently is now typed with pandas-stubs==2.3, but was not typed before. Since pandas 2.3 is compatible with Python 3.9 all CI runs should pick up this change, but if it continues to be an issue I'll look into a workaround for seeing if it's possible to conditionally add the type: ignore directive.
• np.cumproduct was deprecated some time ago, and removed in numpy>2. We've supported numpy>2 for a while, so it's unclear why this issue only just triggered.