By Natalia Zinets and Pavel Polityuk KYIV (Reuters) – Ukraine’s security and defence council on Friday imposed sanctions on the television channel linked to Yevhen Murayev, the politician named by Britain as the possible leader of a Kremlin puppet government in the event of a Russian invasion. Russia is massing increasing numbers of troops near Ukraine and an invasion could come at any time, including during this month’s Winter Olympics, Washington said on Friday. Murayev, a Ukrainian former opposition lawmaker who has promoted views that closely align with Russian narratives on Ukraine, has c…