The associated ticket on Poetry
(python-poetry/poetry#3010) was closed because
the underlying triggers were mostly resolved in `poetry` `1.2` using the
new installer. In particular, see
python-poetry/poetry#3010 (comment).

We flipped to the new installer in
#5838, so this skip
should no longer be necessary.

This reverts commit ceb5700.

Additionally, this flips the fixture from a Python 2 to a Python 3
fixture. We dropped support for Python 2 a while ago, but didn't notice
this test needed updating because it was skipped.

Another test still needs a python 2 fixture to ensure that lockfiles
still pinned to python 2 throw the correct exception.

So copied the existing fixture, updated it to specify a python 3
version, and then regenerated the lockfile using:
```
PYENV_VERSION=3.10.7 pyenv exec poetry lock --no-update
```

Adding a test to ensure we don't update the pyproject.toml with a new python version, but temporarily we expand the range to allow the update to proceed.