[clang] [llvm] [Inliner] Use distinct DILocations and cache inlineDebugLoc by OrigDL (PR #204817)

[Clemens Wasser via cfe-commits]

clemenswasser wrote:

I have now rebased. The aarch64 CI runner seems to timeout. I guess this is an infra problem and not caused by my changes, as all other builds succeed? Perf improvements stayed the same: https://llvm-compile-time-tracker.com/compare.php?from=e6734a41bb41d91cb880fe7abce46d8146182518&to=a20c67d444cf24a8c466508f4ae9d7593730e8b5&stat=instructions%3Au

https://github.com/llvm/llvm-project/pull/204817