[clang] [CIR] Upstream basic support for ArrayType (PR #130502)

[Amr Hesham via cfe-commits]

AmrDeveloper wrote:

> My concern is still not fixed, and Andy/Bruno still have comments here, so I don't believe this to be ready yet.

I already addressed all comments except the test for Size and it's need sizeof PR to merge, and the assert line which we need to agree on, other than that every thing is addressed :D

https://github.com/llvm/llvm-project/pull/130502