[clang] [clang][Sema] support block pointers as non-type template parameters (PR #191694)

[Matheus Izvekov via cfe-commits]

mizvekov wrote:

Hello, according to the LLVM project etiquette, please don't ping someone more often than once a week, unless it's really urgent like a breakage or release blocker.

https://github.com/llvm/llvm-project/pull/191694