[lld] [llvm] [LTO][lld] Emit textual assembly code with '--save-temps' (PR #195922)

[Joseph Huber via llvm-commits]

jhuber6 wrote:

Now requires `--save-temps=asm`, uses a hook function like the others, and goes through the MC layer to avoid cloning the module.

https://github.com/llvm/llvm-project/pull/195922