Replace reduce_labels with do_reduce_labels (#21218)

* Replace reduce_labels with do_reduce_labels

* Replace only for __init__ and preprocess

* Update tests

tests/models/maskformer/test_image_processing_maskformer.py

@@ -53,7 +53,7 @@ class MaskFormerFeatureExtractionTester(unittest.TestCase):
         image_mean=[0.5, 0.5, 0.5],
         image_std=[0.5, 0.5, 0.5],
         num_labels=10,
-        reduce_labels=True,
+        do_reduce_labels=True,
         ignore_index=255,
     ):
         self.parent = parent
@@ -74,7 +74,7 @@ class MaskFormerFeatureExtractionTester(unittest.TestCase):
         self.height = 3
         self.width = 4
         self.num_labels = num_labels
-        self.reduce_labels = reduce_labels
+        self.do_reduce_labels = do_reduce_labels
         self.ignore_index = ignore_index
 
     def prepare_feat_extract_dict(self):
@@ -86,7 +86,7 @@ class MaskFormerFeatureExtractionTester(unittest.TestCase):
             "image_std": self.image_std,
             "size_divisor": self.size_divisor,
             "num_labels": self.num_labels,
-            "reduce_labels": self.reduce_labels,
+            "do_reduce_labels": self.do_reduce_labels,
             "ignore_index": self.ignore_index,
         }