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

[Stella Laurenzo via llvm-commits]

stellaraccident wrote:

> > Please add `nanobind>=2.0` to `mlir/python/requirements.txt`. This is how we document that users should get their deps. I can't remember if the bots use it (but probably should).
> 
> Already there.
> 
> BTW, is there documentation on how to run all the MLIR Python tests? Apparently CI is running some I didn't find. I looked at https://mlir.llvm.org/docs/Bindings/Python/#testing for guidance but to no avail.

Would appear to be setup to do the right thing: https://github.com/llvm/llvm-project/blob/main/.ci/monolithic-linux.sh#L48

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