[llvm] [NVPTX] Do not run the NVVMReflect pass as part of the normal pipeline (PR #121834)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

Here's my attempt, hopefully it's not too invasive. Eager to get this landed so OpenMC works again.

https://github.com/llvm/llvm-project/pull/121834