[llvm] [MachineLICM][AArch64] Hoist COPY instructions with other uses in the loop (PR #71403)

[David Green via llvm-commits]

davemgreen wrote:

Thanks. Can you rebase to see if the issue with the test goes away?
Adding some AMD reviewers to check these test changes look OK

https://github.com/llvm/llvm-project/pull/71403