[llvm] [llvm-c] Add LLVMParseIRInContext2 (PR #174085)

[Tamir Duberstein via llvm-commits]

tamird wrote:

We can't use `module_of_memorybuffer` because there are other functions with similar signatures, see https://github.com/llvm/llvm-project/blob/main/llvm/bindings/ocaml/bitreader/llvm_bitreader.mli (the function name needs to tell us what's expected to be in the memory buffer).

However we can certainly rename the function (to what?).

https://github.com/llvm/llvm-project/pull/174085