Multithreading might fail in Github MacOS runners

[hagenw]

In the tests of audb we get some random crashes in the CI runner on MacOS from time to time (compare https://github.com/audeering/audb/actions/runs/8937265314/job/24549187258?pr=386):

This seems to be related to audresample.

[hagenw]

The error seems not to be related to audmetric, but maybe to tqdm or a memory issue.