[clang] [Clang][Sema] Don't assert on mismatched array type in decomposition-decl fast path (PR #210964)

[Corentin Jabot via cfe-commits]

https://github.com/cor3ntin commented:

I think a better approach would be for no initialization to be performed. Is that something you tried to explore?
i.e we should mark the declaration invalid and/or bail-out earlier

https://github.com/llvm/llvm-project/pull/210964