fix display problems when image fails to load (#25969)

Summary:
This problem was also affecting Fabric and was fixed in D16708532.
When the image resource is changed and the new image resource fails to load, we expect the display image to fail to load, but the image still shows the image that was successfully loaded last time.

## Changelog

[iOS] [Fixed] - fix display problems when image fails to load
Pull Request resolved: #25969

Test Plan:
This is catalyst playground with following code P78264143.
TLDR of the code, it sets URL <Image> that is 404.

{F175486515}

Reviewed By: makovkastar

Differential Revision: D16783330

Pulled By: sammy-SC

fbshipit-source-id: 1cb488590ce15d957357f32a73ebf8df6cccf4cd

Libraries/Image/RCTImageView.m

@@ -347,6 +347,10 @@ - (void)imageLoaderLoadedImage:(UIImage *)loadedImage error:(NSError *)error for
   }
 
   if (error) {
+    RCTExecuteOnMainQueue(^{
+      self.image = nil;
+    });
+
     if (_onError) {
       _onError(@{ @"error": error.localizedDescription });
     }