[clang] [clang][ssaf] Add `JSONFormat` support for `WPASuite` (PR #191082)

[Aviral Goel via cfe-commits]

aviralg wrote:

Another attempt at landing https://github.com/llvm/llvm-project/pull/187403 with `static inline` replaced with function-local statics.

https://github.com/llvm/llvm-project/pull/191082