[clang-tools-extra] [clang-tidy] Add user-defined functions to `bugprone-unsafe-functions` check (PR #106350)

[Kristóf Umann via cfe-commits]

https://github.com/Szelethus commented:

Alright, I think this patch is good from a design standpoint! I'll get into the nitty-gritty in a bit.

https://github.com/llvm/llvm-project/pull/106350