Fix classifying the wrong image in FL duet_mnist

[mohres]

Fix FL duet_mnist classify_url_image function classifying the wrong image

Description

This PR solves the issue of Classifying the wrong image in federated learning duet_mnist url_image example. the function classify_url_image does not really classify the received image's URL; it displays the received image im but predicts the value of image_1, which is an example from the test dataset.
The solution resizes and converts the Image object to a tensor object and sends the object to classifıcatıon functıon classify_local

Affected Dependencies

None

How has this been tested?

• Uncommenting the function's test cell and running it shows that it classifies the image successfully.

Checklist

• I have followed the Contribution Guidelines and Code of Conduct
• I have commented my code following the OpenMined Styleguide
• I have labeled this PR with the relevant Type labels
• My changes are covered by tests

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