[llvm] [mlir] [MLIR][Python] reland (narrower) type stub generation (PR #157930)

[Maksim Levental via llvm-commits]

makslevental wrote:

Note, this has been tested against IREE with @Hardcode84's help https://github.com/iree-org/iree/pull/21916.

https://github.com/llvm/llvm-project/pull/157930