[clang] [llvm] [DTLTO][Clang] Add support for Integrated Distributed ThinLTO (PR #147265)

[via llvm-commits]

bd1976bris wrote:

@Kewen12, @ilovepi and @Prabhuk should be fixed by: https://github.com/llvm/llvm-project/commit/edfec9c5829f4778bd38f3ca4019105eb481df49. I'm running out of dev time today so if there are any other problems I will revert.

https://github.com/llvm/llvm-project/pull/147265