[llvm] Reapply "[aarch64][win] Add support for import call optimization (equivalent to MSVC /d2ImportCallOptimization) (#121516)" (PR #122777)

[Daniel Paoliello via llvm-commits]

dpaoliello wrote:

> Is this from the commit https://lab.llvm.org/buildbot/#/builders/52/builds/5219

Timing seems correlated. I don't understand what failed in the test, seems like there's no output? 



https://github.com/llvm/llvm-project/pull/122777