[clang] [lld] [llvm] Integrated Distributed ThinLTO (DTLTO): Initial support (PR #126654)

[Vincent Lee via cfe-commits]

https://github.com/thevinster commented:

The example of using `llvm/utils/dtlto/local.py` is super useful. Could be worth mentioning that explicitly as a helpful tip for folks looking to integrate with their distribution process. Looking forward to the smaller patches. 

https://github.com/llvm/llvm-project/pull/126654