[llvm] [NVPTX] Unify and extend barrier{.cta} intrinsic support (PR #140615)

[Artem Belevich via llvm-commits]

https://github.com/Artem-B approved this pull request.

Nice. I like the new naming scheme.

LGTM w/ a few nits.



https://github.com/llvm/llvm-project/pull/140615