Tests that use ign-math6 python bindings are failing in CI

[azeey]

Python binding tests are failing with

ImportError while importing test module '/Users/jenkins/jenkins-agent/workspace/ignition_gazebo-ci-pr_any-homebrew-amd64/ign-gazebo/python/test/testFixture_TEST.py'.
Hint: make sure your test modules/packages have valid Python names.
Traceback:
/usr/local/Cellar/python@3.11/3.11.3/Frameworks/Python.framework/Versions/3.11/lib/python3.11/importlib/__init__.py:126: in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
../../ign-gazebo/python/test/testFixture_TEST.py:20: in <module>
    from ignition.math import Vector3d
E   ModuleNotFoundError: No module named 'ignition.math'

in gazebosim/gz-sim#1989 (see https://build.osrfoundation.org/job/ignition_gazebo-ci-pr_any-homebrew-amd64/10054/testReport/).
I think the issue is python@3.11 is the version of python in the test, but the ign-math6 bottle was built with python@3.10. Do we need to rebuild the ign-math6 bottle or is there a better solution? Does #1910 help with this?