[clang] [analyzer] Don't invalidate pointee of pointer-to-const on callback arguments (PR #225489)

[Balázs Benics via cfe-commits]

https://github.com/steakhal approved this pull request.

I'm pretty sure this is a fine change.
I wish that we had a better way to configure invalidations other than a super confusing enum btw. For a long time I wanted to think about what could be a better design but it's very difficult to think every use-cases through all at once.

https://github.com/llvm/llvm-project/pull/225489