By Pavel Polityuk KYIV (Reuters) -All women, children and elderly civilians have been evacuated from the Azovstal steel mill in Mariupol, Ukraine’s deputy prime minister said on Saturday, despite what military officers said was an ongoing Russian assault at the plant. “This part of the Mariupol humanitarian operation is over,” Deputy Prime Minister Iryna Vereshchuk wrote on the Telegram messaging app. The Soviet-era steel mill, the last holdout in Mariupol for Ukrainian forces, has emerged as a symbol of resistance to the Russian effort to capture swathes of eastern and southern Ukraine in the…