fd-util: rename CLOSE_AND_REPLACE() -> close_and_replace()

We have free_and_replace() and friends, they are all named with lower
letters, even they are macros, not functions.
For consistency, let's rename CLOSE_AND_REPLACE() with lower letters.

This also mekes the macro used more places.

src/shared/data-fd-util.c

@@ -298,7 +298,7 @@ int copy_data_fd(int fd) {
                 if (f != 0)
                         return -errno;
 
-                CLOSE_AND_REPLACE(copy_fd, tmp_fd);
+                close_and_replace(copy_fd, tmp_fd);
 
                 remains = mfree(remains);
                 remains_size = 0;