[clang] [analyzer] Harden security.cert.env.InvalidPtr checker fn matching (PR #88536)

[Balazs Benics via cfe-commits]

steakhal wrote:

@iillyyaa, do you wish this crash fix to be backported to clang-18?
Or you are fine with only having it in clang-19?

https://github.com/llvm/llvm-project/pull/88536