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

[David Sherwood via llvm-commits]

https://github.com/david-arm approved this pull request.

LGTM! The test changes look favourable in almost all cases and the code change makes sense to me.

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