[llvm] Add debuginfo C support for a SetType, Subrangetype, dynamic array type and replace arrays (PR #135607)

[Orlando Cazalet-Hyams via llvm-commits]

OCHyams wrote:

Just in case the comment gets lost (github has a habit of swallowing inline comments...) - there's an outstanding nit for the function comments (specifically for the argument descriptions):

> Given the assertion failure, I think more info about the expected type is needed here, and you should mention which parameters are ok to be null. Same for the other functions.

https://github.com/llvm/llvm-project/pull/135607