[mypyc] Fix crash on double yielding Iterators - #21826

Closes mypyc/mypyc#1210

This fixes another issue I ran into while trying to use `mypyc` for
`isort`.

I am aware the contributing guidelines say new contributors are not
encouraged to use LLMs but I hope this can get the same handling as
#21785. I have tried to ensure this
patch works as much as I can by:

Testing locally with `pytest mypyc/test/test_run.py `.
Tested that the test fails on `master` without the changes.
Also tried to run CI on my local fork
(DanielNoord#2), which succeeded.

As with the previous PR, feel free to push changes to the branch or
cherry pick this into another branch. I just want to unblock `isort` :)

Closes mypyc/mypyc#1210

This fixes another issue I ran into while trying to use `mypyc` for
`isort`.

I am aware the contributing guidelines say new contributors are not
encouraged to use LLMs but I hope this can get the same handling as
#21785. I have tried to ensure this
patch works as much as I can by:

Testing locally with `pytest mypyc/test/test_run.py `.
Tested that the test fails on `master` without the changes.
Also tried to run CI on my local fork
(DanielNoord#2), which succeeded.

As with the previous PR, feel free to push changes to the branch or
cherry pick this into another branch. I just want to unblock `isort` :)

This PR contains the following updates:

| Package | Change | [Age](https://docs.renovatebot.com/merge-confidence/) | [Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
| [mypy](https://github.com/python/mypy) ([changelog](https://mypy.readthedocs.io/en/latest/changelog.html)) | `==2.3.0` → `==2.3.1` | ![age](https://developer.mend.io/api/mc/badges/age/pypi/mypy/2.3.1?slim=true) | ![confidence](https://developer.mend.io/api/mc/badges/confidence/pypi/mypy/2.3.0/2.3.1?slim=true) |

---

### Release Notes

<details>
<summary>python/mypy (mypy)</summary>

### [`v2.3.1`](https://github.com/python/mypy/blob/HEAD/CHANGELOG.md#Mypy-231)

[Compare Source](python/mypy@v2.3.0...v2.3.1)

- Fix mypyc crash on double yielding Iterators (Daniël van Noord, PR [21826](python/mypy#21826))
- Fix mypyc `default_factory` for inherited dataclass (Daniël van Noord, PR [21785](python/mypy#21785))
- Clear mypyc coroutine env on coroutine completion (Piotr Sawicki, PR [21734](python/mypy#21734))
- Fix crash when unpacking return value from overload (Shantanu, PR [21830](python/mypy#21830))

</details>

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