[BUG]: Add test case from #4100 to verify that #4876 did not reintroduce bug

[Skylion007]

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What version (or hash if on master) of pybind11 are you using?

latest

Problem description

I was looking over recent PRs, and I noticed that we used to have the fowarding added in #4876 but reverted it due to #4100, we really should add a test to verify we didn't break anything.

Reproducible example code

See #4100

Is this a regression? Put the last known working version here if it is.

Not a regression

[henryiii]

🤖 AI text below 🤖

This was verified against current master. The requested regression tests for #4100 are already present: #4234 added them to tests/test_sequences_and_iterators.py and tests/test_sequences_and_iterators.cpp, and #4876 landed with those tests green. Closing as complete.

If you can still reproduce this with current master (v3), please comment and we can reopen.