Kernel+AK: Generate compile-time error for non-sized delete

This is a much more ergonomic option than getting a
`VERIFY_NOT_REACHED()` failure at run-time. I encountered this issue
with Clang, where sized deallocation is not the default due to ABI
breakage concerns.

Note that we can't simply just not declare these functions, because the
C++ standard states:
> If this function with size parameter is defined, the program shall
> also define the version without the size parameter.

AK/Platform.h

@@ -59,6 +59,15 @@
 #endif
 #define NAKED __attribute__((naked))
 
+#ifdef DISALLOW
+#    undef DISALLOW
+#endif
+#ifdef __clang__
+#    define DISALLOW(message) __attribute__((diagnose_if(1, message, "error")))
+#else
+#    define DISALLOW(message) __attribute__((error(message)))
+#endif
+
 // GCC doesn't have __has_feature but clang does
 #ifndef __has_feature
 #    define __has_feature(...) 0