LPS-44206 Send the image URL during the edition, this way we can properly update the field value. If we don't send the bytes nor the image URL it means we want delete the field. This is the same pattern we follow for the other fields.
LPS-44206 No need to fetch the default image here because we're sending the default image URL during the article translation.
LPS-44206 Image field value only carries JSON object
LPS-44206 Field index was being incorrectly generated and causing wrong values for the image field when they were added as nested of other field