llvm-project

803cbcbc - [clang-tidy] Enable C23 support in modernize-use-nullptr (#89990)

[clang-tidy] Enable C23 support in modernize-use-nullptr (#89990) C23 introduces the `nullptr` constant similar to C++11 which means that the checker `modernize-use-nullptr` can be used on C23 code as well. This PR enables the checker to be run on C23 and adds testcases. See N3042: https://open-std.org/JTC1/SC22/WG14/www/docs/n3042.htm