[llvm] [mlir] [mlir python] Port in-tree dialects to nanobind. (PR #119924)

[Peter Hawkins via llvm-commits]

hawkinsp wrote:

> > Overall looks good, I think we can do the following to avoid more of the nanobind warnings (else it just results in too much logging)
> 
> Instead of disabling warnings when building our sources, can we just disable them on nanobing headers? (that is defining the nanobind include path as system headers instead of regular include)

How does one do that, exactly?

https://github.com/llvm/llvm-project/pull/119924