By Steve Holland and Gram Slattery WASHINGTON, July 5 (Reuters) - U.S. President Donald Trump will meet with Ukrainian President Volodymyr Zelenskiy while in Turkey this week for a NATO summit to make a renewed push to end the war in Ukraine, a senior U.S. official said on Sunday. Trump is scheduled to arrive at the summit on Tuesday. His first meeting will be with the summit host, Turkish President Tayyip Erdogan. Trump will also meet with Syrian ⁠President Ahmed al-Sharaa and hold a news confe