[tests] further fix Tester object has no attribute '_testMethodName' (#35781)

* bug fix

* update with more cases

* more entries

* Fix

---------

Co-authored-by: ydshieh <ydshieh@users.noreply.github.com>

tests/models/idefics3/test_image_processing_idefics3.py

@@ -35,7 +35,7 @@ if is_torch_available():
     import torch
 
 
-class Idefics3ImageProcessingTester(unittest.TestCase):
+class Idefics3ImageProcessingTester:
     def __init__(
         self,
         parent,
@@ -58,7 +58,6 @@ class Idefics3ImageProcessingTester(unittest.TestCase):
         do_image_splitting=True,
         resample=PILImageResampling.LANCZOS,
     ):
-        super().__init__()
         self.size = size if size is not None else {"longest_edge": max_resolution}
         self.parent = parent
         self.batch_size = batch_size