CI: Compiler sanitizers tests are hanging intermittently

The actions label is gcc_sanitizers. All of the test runs show errors, some of which look valid, but none cause the test to fail. I have to wonder where the bogus values come from, are they byproducts of the sanitizer? See https://github.com/numpy/numpy/actions/runs/8008572322/job/21875289661 for examples.

I also note that the time was normally around 20 minutes, it is now well in excess of 2 hours. Something has changed.