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

[Steven Wu via cfe-commits]

https://github.com/cachemeifyoucan commented:

Some high level comments:
* Should we just call it distributedLTO, or DLTO? Feel like we can drop the thin part for less typing, and from the user's point of view, using thinLTO infrastructure is just implementation details.
* Are you going to implement some ways to speed up archive or that will come as follow ups? During previous discussion at dev meeting, there are few suggestions for how to do it without extracting archives. 

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