[llvm] [OCaml][NPM] Add OCaml bindings to new pass manager (PR #66421)

[via llvm-commits]

alan-j-hu wrote:

If I do use the result type, I want to share a single allocation of `Ok ()` across all calls. What is the best way for me to do this?

https://github.com/llvm/llvm-project/pull/66421