The macOS-13 based runner images are retired

The CI is failing on MacOS as the macOS-13 images are retired as of 4th December 2025:

For example: https://github.com/KernelTuner/kernel_tuner/actions/runs/20031006163/job/57439869118?pr=342

More information: https://github.com/actions/runner-images/issues/13046
