[libc++] Consistently replace `::new(__p) T` with `::new ((void*)__p) T`. NFCI.

Everywhere, normalize the whitespace to `::new (EXPR) T`.
Everywhere, normalize the spelling of the cast to `(void*)EXPR`.

Without the cast to `(void*)`, the expression triggers ADL on GCC.
(I think this is a GCC bug: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98249)
Even if it doesn't trigger ADL, it still seems incorrect to use any argument
that's not exactly `(void*)` because that opens the possibility of overload
resolution picking a user-defined overload of `operator new`, which would be
wrong.

Differential Revision: https://reviews.llvm.org/D93153

GitOrigin-RevId: be4c657b010c3fd850ca5cfcee0f96b464740523
diff --git a/include/__debug b/include/__debug
index be80275..7b5bfb3 100644
--- a/include/__debug
+++ b/include/__debug
@@ -221,7 +221,7 @@
 
     template <class _Cont>
     _LIBCPP_INLINE_VISIBILITY static __c_node* __create_C_node(void *__mem, void *__c, __c_node *__next) {
-        return ::new(__mem) _C_node<_Cont>(__c, __next);
+        return ::new (__mem) _C_node<_Cont>(__c, __next);
     }
 
     template <class _Cont>