[llvm] [NVVM] Add various intrinsic attrs, cleanup and consolidate td (PR #153436)

[Artem Belevich via llvm-commits]

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

Looks OK in general, but I'm somewhat concerned that we have no way to test the effect of those changes.

I would not be surprised if this change will break something whether because we may have missed something.

Please land it at some point in a middle of the work week, so we're around to revert it if something pops up.

https://github.com/llvm/llvm-project/pull/153436