Fix #8442: pass meta_data to EnsureChannelFirst when track_meta is False

When set_track_meta(False) is active, MetaTensor.ensure_torch_and_prune_meta
returns a plain tensor. The subsequent EnsureChannelFirst() call then has no
metadata source, causing a ValueError. Fix: pass meta_data explicitly when
img is not a MetaTensor.

Signed-off-by: UGBOMEH OGOCHUKWU WILLIAMS <williamsugbomeh@gmail.com>

Author: williams145

monai/transforms/io/array.py

@@ -300,7 +300,10 @@ def __call__(self, filename: Sequence[PathLike] | PathLike, reader: ImageReader
             img_array, meta_data, self.simple_keys, pattern=self.pattern, sep=self.sep
         )
         if self.ensure_channel_first:
-            img = EnsureChannelFirst()(img)
+            if not isinstance(img, MetaTensor):
+                img = EnsureChannelFirst()(img, meta_dict=meta_data)
+            else:
+                img = EnsureChannelFirst()(img)
         if self.image_only:
             return img
         return img, img.meta if isinstance(img, MetaTensor) else meta_data