[clang] [llvm] Introduce -defer-thinlto-prelink-coro-split that skips Coro passes in ThinLTO pre-link pipeline (PR #107153)

[Mircea Trofin via cfe-commits]

mtrofin wrote:

What's the scenario in which we do ThinLTO prelink and then go to codegen (i.e. skip thinlto post-link)?

https://github.com/llvm/llvm-project/pull/107153