[clang] [CIR] Upstream support for iterator-based range for loops (PR #140636)

[Bruno Cardoso Lopes via cfe-commits]

https://github.com/bcardosolopes approved this pull request.

Pretty much straightforward - some skeletons with NYI + the actual range for support. LGTM

https://github.com/llvm/llvm-project/pull/140636