[clang] [CIR] Upstream a batch of passing tests from CIR-Incubator (PR #157333)

[Burhan Söğüt via cfe-commits]

bursot wrote:

> Thanks for removing other files. Can you please check those nits
> 
> For comments related to updating pattern matching, for example, to be similar to other tests `%[[NAME: REGEX]]`. If you want to do it, I can guide you more; if not, we can delay it later

Sure. I'd like to try updating the pattern matching now. Your guidance would be very helpful. I want to learn more!

https://github.com/llvm/llvm-project/pull/157333