Disable tests for CUDA configurations in CI

[msimberg]

We can't yet have #1225, so disable CUDA tests for now and leave the CUDA builds in place in CI.

[msimberg]

I've simply commented out the test stages with CUDA now. Let me know if you'd prefer completely deleting the blocks.

[msimberg]

cscs-ci run

[msimberg]

There were two timeouts on test_bt_reduction_to_band:

• https://gitlab.com/cscs-ci/ci-testing/webhook-ci/mirrors/4700071344751697/7514005670787789/-/jobs/8962098059#L2271
• https://gitlab.com/cscs-ci/ci-testing/webhook-ci/mirrors/4700071344751697/7514005670787789/-/jobs/8962503293#L2264

The eigensolver test times out after that as well, but my guess is that it's just a consequence of MPI going into an inconsistent state (the test hangs in the beginning).

I think the test_bt_reduction_to_band tests timing out is still the same old scoped trace issue, though without segfaults in these particular instances. #1258 and #838 will help diagnose and improve, respectively, the situation. We still need pika 0.31.0 to fix the last (known) source of yielding, but those two PRs will already help quite a bit.

Edit: I've restarted the two failed test jobs.

[msimberg]

All remaining tests passed after one rerun.