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

[Joseph Huber via llvm-commits]

jhuber6 wrote:

> That would work, too.

It's a little annoying for NVPTX because we just default to `sm_30` in these cases, might need to invent some way to detect if it's not been passed.

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