[clang] [Clang][Sema] Mark decomposition decl invalid for explicit array type (PR #210964)

[Corentin Jabot via cfe-commits]

cor3ntin wrote:

Please do not ping people more than once a week - I'm still trying to figure out if this approach is reasonable, i will follow up as soon as I can. Thanks

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