[llvm] [LLVM-C] Move LLVMDISubrangeTypeMetadataKind to end of LLVMMetadataKind enum (PR #132268)

[via llvm-commits]

alan-j-hu wrote:

I'm not sure what LLVM's practices are; is it always recommended to add new enum variants to the end to avoid ABI breakage; or is it fine to add new enum constants in the middle, and I should just update the OCaml bindings to properly reflect the C API?

https://github.com/llvm/llvm-project/pull/132268