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

[Rahul Kayaith via llvm-commits]

rkayaith wrote:

> But I feel like the fact that you have to add docs like https://mlir.llvm.org/docs/Bindings/Python/#recommended-development-practices indicates that something is going wrong here. Building LLVM should not require this kind of additional setup. I should not have to remember to activate a venv any time I work on LLVM.

This is pretty standard fare for python development. Also I believe you should only need to activate the venv when configuring (or alternatively it should be sufficient to just specify `Python3_EXECUTABLE`, without having to activate)

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