[llvm] [llvm-c] Provide LLVMGetGEPResultElementType (PR #95693)

[Nikita Popov via llvm-commits]

nikic wrote:

Why do you need this? Use of getResultElementType() is something of a red flag, and I do not want to expose it to the C API unless there is a strong need.

https://github.com/llvm/llvm-project/pull/95693