[llvm] [ARM] Port ConditionOptimizer to ARM (PR #151187)

[Nashe Mncube via llvm-commits]

https://github.com/nasherm commented:

> From there I'm wondering if it's worth making this pass generic instead. If we worked on abstracting out some of the AArch64-specific code into TII hooks (or maybe there are existing ones that could serve us), then adding arm support could become a more straightforward addition.

I think this is a good point from @hussam-alhassan . We don't want to have a bunch of duplicate code which means we have  extra work to make sure both passes don't diverge. I'd much rather have a generic pass which can be enabled with TII hooks as mentioned by Hussam. 

https://github.com/llvm/llvm-project/pull/151187