[libc++] Don't try to used noexcept in C++03

`__is_nothrow_invocable` isn't used in C++03, so we never noticed that
it's not `constexpr`. This is caught by the clang-tidy ADL check
with LLVM 22, since it's treated like a normal function call in C++03.
It's only caught with LLVM 22, since `__builtin_invoke` wasn't available
before.

Author: philnik777

libcxx/include/__type_traits/invoke.h

@@ -112,8 +112,10 @@ inline const bool __is_invocable_r_v = __is_invocable_r_impl<_Ret, __is_invocabl
 template <bool __is_invocable, class... _Args>
 inline const bool __is_nothrow_invocable_impl = false;
 
+#  ifndef _LIBCPP_CXX03_LANG
 template <class... _Args>
 inline const bool __is_nothrow_invocable_impl<true, _Args...> = noexcept(__builtin_invoke(std::declval<_Args>()...));
+#  endif
 
 template <class... _Args>
 inline const bool __is_nothrow_invocable_v = __is_nothrow_invocable_impl<__is_invocable_v<_Args...>, _Args...>;