Update xcopa dataset (fix checksum issues + add translated data)
This PR updates the checksums (as reported [here](https://discuss.huggingface.co/t/how-to-load-dataset-locally/11601/2)) of the `xcopa` dataset. Additionally, it adds new configs that hold the translated data of the original set of configs. This data was not available at the time of adding this dataset to the lib.
The CI failures are unrelated to the changes (missing fields in the readme and the CER metric error fixed in #3252).