Use data column descriptors from git repo for Italian dataset

renku dataset unlink -I dati-* covid-19-italy

renku dataset: committing 1 newly added files

renku dataset add covid-19-italy -s dati-andamento-nazionale/dati-andamento-nazionale-description.json https://github.com/ableuler/COVID-19.git --force

renku dataset: committing 1 newly added files

renku dataset add covid-19-italy -s dati-regioni/dati-regioni-description.json https://github.com/ableuler/COVID-19.git --force

renku dataset: committing 1 newly added files

renku dataset add covid-19-italy -s dati-province/dati-province-description.json https://github.com/ableuler/COVID-19.git --force