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

[via llvm-commits]

Rin18 wrote:

> > Yeah, rebasing sounds like a good idea, I'll do that.
> 
> Hmm, the PR looks a little odd now! There is a single commit in the PR, that is itself a squashed commit.

Merged after rebase which led to the commits from main appearing on my PR. Had to squash them to fix it which is why there's only one commit now.

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