[clang] [CIR] Cast global addresses to their declared address space (PR #226649)

[Konstantinos Parasyris via cfe-commits]

https://github.com/koparasy commented:

Don't we need similar handling [here](https://github.com/llvm/llvm-project/blob/main/clang/lib/CIR/CodeGen/CIRGenDecl.cpp#L717) ?

https://github.com/llvm/llvm-project/pull/226649