[clang-tidy] Correcting issues in `readability-implicit-bool-conversion` on C23 (#92241)

`readability-implicit-bool-conversion` supports language-versions with
`LangOpts.Bool` which includes C23.

This PR corrects an issue that the fixer suggests `static_cast<>()`
which is not available in C23,
and will instead suggest C-style casts on other than C++.

The fixer will also suggest using `nullptr` instead of `0` and avoid a
problem with recursive fixes on C23.

The recursive issue, a function taking bool and a comparison, is now
excluded as in C++.