[llvm] [mlir] [mlir python] Add nanobind support for standalone dialects. (PR #117922)

[Maksim Levental via llvm-commits]

makslevental wrote:

Okay I found the AMD infra [/utils/buildbot/mlir-rocm-mi200](https://github.com/ROCm/rocMLIR/tree/e498eadb154315bc5c72d6cc85f2ffcdd146b4cc/mlir/utils/buildbot/mlir-rocm-mi200) but it needs to be rebuilt I guess.

> I'd assume the only other thing we can do is ping the owner of the bot?

I believe the owner is no longer at AMD but I am so I can ask aroud.

https://github.com/llvm/llvm-project/pull/117922