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/import/import-raw.c

@@ -195,7 +195,7 @@ static int raw_import_maybe_convert_qcow2(RawImport *i) {
 
         unlink_and_free(i->temp_path);
         i->temp_path = TAKE_PTR(t);
-        CLOSE_AND_REPLACE(i->output_fd, converted_fd);
+        close_and_replace(i->output_fd, converted_fd);
 
         return 1;
 }

src/import/pull-raw.c

@@ -280,7 +280,7 @@ static int raw_pull_maybe_convert_qcow2(RawPull *i) {
 
         unlink_and_free(i->temp_path);
         i->temp_path = TAKE_PTR(t);
-        CLOSE_AND_REPLACE(i->raw_job->disk_fd, converted_fd);
+        close_and_replace(i->raw_job->disk_fd, converted_fd);
 
         return 1;
 }