[clang] [clang][analyzer] Correctly handle lambda-converted function pointers (PR #144906)

[Balazs Benics via cfe-commits]

steakhal wrote:

Hey, looks like a nice patch!

I only have one question. Have you considered overriding some other `getRuntimeDefinition` too? When I'm looking at the [CallEvent ](https://clang.llvm.org/doxygen/classclang_1_1ento_1_1CallEvent.html) inheritance graph, there could be a couple other options too.
Don't get me wrong, the `SimpleFunctionCall::getRuntimeDefinition` looks like the right place. I'm just curious.

https://github.com/llvm/llvm-project/pull/144906