[Fix]: Fix compatibility issue with MMCV 2.0.0rc4 on data transforms (#9703)

Author: zwhus

mmdet/datasets/transforms/loading.py

@@ -525,6 +525,7 @@ def __init__(
                 'panopticapi.git.')
         self.rgb2id = utils.rgb2id
 
+        self.file_client = FileClient(**file_client_args)
         super(LoadPanopticAnnotations, self).__init__(
             with_bbox=with_bbox,
             with_label=with_label,

tests/test_datasets/test_transforms/test_loading.py

@@ -122,7 +122,7 @@ def test_repr(self):
                               'with_label=False, with_mask=False, '
                               'with_seg=False, poly2mask=True, '
                               "imdecode_backend='cv2', "
-                              "file_client_args={'backend': 'disk'})"))
+                              'file_client_args=None)'))
 
 
 class TestFilterAnnotations(unittest.TestCase):
@@ -344,7 +344,7 @@ def test_repr(self):
                               'to_float32=False, '
                               "color_type='color', "
                               "imdecode_backend='cv2', "
-                              "file_client_args={'backend': 'disk'})"))
+                              'backend_args=None)'))
 
 
 class TestLoadMultiChannelImageFromFiles(unittest.TestCase):