Don't set image.title to file basename in graphql (#5658)

* Don't set image title to filename in graphql
* Remove deprecated files field from image fragments

gqlgen.yml

@@ -35,12 +35,6 @@ models:
     model: github.com/stashapp/stash/internal/api.BoolMap
   PluginConfigMap:
     model: github.com/stashapp/stash/internal/api.PluginConfigMap
-  # define to force resolvers
-  Image:
-    model: github.com/stashapp/stash/pkg/models.Image
-    fields:
-      title:
-        resolver: true
   VideoFile:
     fields:
       # override float fields - #1572