Comment 3 for bug 1997365

Oh, you're right about setuptools. We used to fix setuptools version in prior releases, but dropped that since setuptools appeared in upper-constraints.
And I think we totally missed that in Yoga and Zed it's dropped out of u-c, or well, it's constrained only for specific python versions:
https://opendev.org/openstack/requirements/src/branch/stable/yoga/upper-constraints.txt#L643-L644

Quite easy to fix though, despite it's a bit annoying thing.