[llvm] [ARM] Replace manual CLS expansion with ISD::CTLS (PR #178430)

[Hamza Hassanain via llvm-commits]

HamzaHassanain wrote:

@topperc, I have issues on my machine with building the project and testing.
So I really on the pipeline tests. Currently, I just wanna fix the testing failure, then address the formatting 

https://github.com/llvm/llvm-project/pull/178430