test: give the statistics fixtures distinct file and total counts

The artist, album and season statistics fixtures set the file count equal to the total count, so the columns rendering the pair showed the same number twice and swapping the two fields changed nothing. The JSON fixtures move with them so the round trip assertions still hold.

src/handlers/sonarr_handlers/sonarr_handler_test_utils.rs

@@ -338,7 +338,7 @@ pub(in crate::handlers::sonarr_handlers) mod utils {
         DateTime::parse_from_rfc3339("2022-10-24T01:00:00Z").unwrap(),
       )),
       next_airing: None,
-      episode_file_count: 10,
+      episode_file_count: 7,
       episode_count: 10,
       total_episode_count: 10,
       size_on_disk: 36708563419,