[clang] [Clang] Improve support for expression messages in `static_assert` (PR #73234)

[via cfe-commits]

cor3ntin wrote:

@sylvestre Thanks. It seems like GCC 7.5 does not select the appropriate constructor  https://compiler-explorer.com/z/oc315aYnT - I will commit a fix in a bit.

https://github.com/llvm/llvm-project/pull/73234