[clang] [clang][constexpr] Fix assertion failure in C++26 constexpr structured binding pack evaluation (#170991) (PR #213534)

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babadany2999 wrote:

This got closed unintentionally since i needed another fork of llvm and I didn't know deleting the current fork would lead to PR closing(in retrospect it makes sense).
I'll open soon another PR referencing this one.

https://github.com/llvm/llvm-project/pull/213534