gh-35438: Ignore deprecation warnings triggered by pythran 0.12.1
These happen with python 3.11, setuptools 67.6.1, numpy 1.24.2. When
pythran 0.12.1 is installed, I get 24 doctest failures due to
deprecation warnings; they are all gone with this commit.
### :memo: Checklist
- [x] The title is concise, informative, and self-explanatory.
- [x] The description explains in detail what this PR is about.
- [x] Current tests cover the changes.
URL: https://github.com/sagemath/sage/pull/35438
Reported by: Gonzalo Tornaría
Reviewer(s): Matthias Köppe
Committer
Release Manager