[clang] [Clang] allow restrict qualifier for array types with pointer types as element types (PR #120896)

[Eli Friedman via cfe-commits]

https://github.com/efriedma-quic requested changes to this pull request.

Oh, just thought of one more thing: we probably want a c23_compat warning for this (assuming the language is new in c23).

https://github.com/llvm/llvm-project/pull/120896