[Clean-up] Planned removal of the `max_size` argument

preprocessor_config.json

@@ -1,18 +1,20 @@
 {
-    "do_normalize": true,
-    "do_resize": true,
-    "feature_extractor_type": "ConditionalDetrFeatureExtractor",
-    "format": "coco_detection",
-    "image_mean": [
-        0.485,
-        0.456,
-        0.406
-    ],
-    "image_std": [
-        0.229,
-        0.224,
-        0.225
-    ],
-    "max_size": 1333,
-    "size": 800
+  "do_normalize": true,
+  "do_resize": true,
+  "image_processor_type": "ConditionalDetrImageProcessor",
+  "format": "coco_detection",
+  "image_mean": [
+    0.485,
+    0.456,
+    0.406
+  ],
+  "image_std": [
+    0.229,
+    0.224,
+    0.225
+  ],
+  "size": {
+    "longest_edge": 1333,
+    "shortest_edge": 800
+  }
 }