By Dan Peleschuk KYIV (Reuters) – After her younger brother was killed in November fighting Russian forces in eastern Ukraine, Anna Birzul spent two days stricken with grief. Then she sprang into action, penning a petition asking President Volodymyr Zelenskiy to award 29-year-old Bohdan Krotov the highest military honour, Hero of Ukraine. “We buried him on the 26th, and already on the 27th I had written it,” said a tearful Birzul, 35, standing at Krotov’s grave in a Kyiv cemetery. A portrait of the combat medic, smiling, hung beneath a fluttering Ukrainian flag that featured his Interior Minis…