[llvm] [NVPTX] Fix failing tests on incompatible PTX version (PR #111988)

[Artem Belevich via llvm-commits]

Artem-B wrote:

Do you have a reproducer for the issue? If that would be happening for CUDA those tests would be failing now, yet I don't see any failures.

https://github.com/llvm/llvm-project/pull/111988