[clang] [clang-tools-extra] Add function check for windows platform (PR #106581)

[Donát Nagy via cfe-commits]

https://github.com/NagyDonat commented:

(This is just a quick drive-by correction of the `CallDescription` matching modes. Other parts of the commit seem to be good, but I don't have a firm opinion.)

https://github.com/llvm/llvm-project/pull/106581