[llvm] Partial work on JITLink ARM64-COFF (PR #89697)

[via llvm-commits]

mcbarton wrote:

I not use Windows on arm. I don't know of anyone who does have access to such a system (no one I know is willing to pay the high price to get one with decent performance). One thing to watch on if using the windows-11-arm Github runners is this https://github.com/orgs/community/discussions/155713#discussioncomment-12991583 (most of the tools installed on the runner decide that it is an x86 machine)

https://github.com/llvm/llvm-project/pull/89697