[clang] [llvm] [DebugInfo] Update DIBuilder insertion to take InsertPosition (PR #126059)

[Harald van Dijk via cfe-commits]

hvdijk wrote:

The buildbot failures look like something conflicted with changes that have since gone in on LLVM. I have reverted the change for now and will check what is going on and update.

https://github.com/llvm/llvm-project/pull/126059