[clang] [clang] Fix a crash from nested ArrayInitLoopExpr (PR #67722)

[Timm Baeder via cfe-commits]

tbaederr wrote:

I've pushed https://github.com/llvm/llvm-project/commit/38018ecf965fda81d15edfb904b5b28adb6051b0 since, so you could remove the `CUR_INTERP` stuff from there and get a new test case for free.

https://github.com/llvm/llvm-project/pull/67722