Use KernelTuner 0.4.3
The interface of Kernel Tuner seems to have changed in version 0.4.4, causing the CI to fail. For now, use 0.4.3 in the CI instead of the master version.
The interface of Kernel Tuner seems to have changed in version 0.4.4, causing the CI to fail. For now, use 0.4.3 in the CI instead of the master version.