FIX: Badge image uploader (#28188)

In the formkit conversion in 2ca06ba236
we missed setting a type for the UppyImageUploader for badges. Also,
we were not passing down the `image_url` as form data, so when we used
`data.image` for that field the badge was not updating in the UI after
page loads and the image URL was not loading for preview.

Co-authored-by: Joffrey JAFFEUX <j.jaffeux@gmail.com>

spec/requests/api/schemas/json/badge_create_response.json

@@ -56,6 +56,12 @@
             "null"
           ]
         },
+        "image_upload_id": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        },
         "listable": {
           "type": "boolean"
         },
@@ -123,7 +129,8 @@
         "target_posts",
         "auto_revoke",
         "show_posts",
-        "badge_type_id"
+        "badge_type_id",
+        "image_upload_id"
       ]
     }
   },

spec/requests/api/schemas/json/badge_list_response.json

@@ -83,6 +83,12 @@
                 "null"
               ]
             },
+            "image_upload_id": {
+              "type": [
+                "integer",
+                "null"
+              ]
+            },
             "badge_type_id": {
               "type": "integer"
             }
@@ -108,7 +114,8 @@
             "target_posts",
             "auto_revoke",
             "show_posts",
-            "badge_type_id"
+            "badge_type_id",
+            "image_upload_id"
           ]
         }
     },

spec/requests/api/schemas/json/badge_update_response.json

@@ -56,6 +56,12 @@
             "null"
           ]
         },
+        "image_upload_id": {
+          "type": [
+            "integer",
+            "null"
+          ]
+        },
         "listable": {
           "type": "boolean"
         },
@@ -123,7 +129,8 @@
         "target_posts",
         "auto_revoke",
         "show_posts",
-        "badge_type_id"
+        "badge_type_id",
+        "image_upload_id"
       ]
     }
   },