basic: Move trivial cleanup/ref/unref macros from macro.h to memory-util.h

Let's keep macro.h for the extremely generic macros that don't fit anywhere
else. Since CLEANUP_ARRAY() is already in memory-util-fundamental.h, we can
make a good case for moving the other cleanup macros in there as well.

src/basic/log-context.h

@@ -5,6 +5,7 @@
 #include <stddef.h>
 
 #include "macro.h"
+#include "memory-util.h"
 
 /*
  * The log context allows attaching extra metadata to log messages written to the journal via log.h. We keep