[llvm] [NVPTX] Fix `ptxas` failures (NFC) (PR #125147)

[Kevin McAfee via llvm-commits]

https://github.com/kalxr approved this pull request.

Seems fine to me.

>From a quick search I don't see any other uses of standalone `%ptxas`, always `%ptxas-verify`. I don't expect we would know if the two tests ever worked with `ptxas-verify`? I'd be curious about what changed if so.

https://github.com/llvm/llvm-project/pull/125147