By Humeyra Pamuk and Mike Stone WASHINGTON (Reuters) – The Biden administration is set to notify Congress in the coming days of the potential sale of F-16 fighter jets to Turkey, sources familiar with the matter said on Friday. The U.S. State Department is likely to kick off an informal notification process called a “tiered review” next week, sources said, a bureaucratic step in notifying Congress of major arms sales. NATO member Turkey requested in October 2021 to buy 40 Lockheed Martin Corp (LMT.N) F-16 fighters and nearly 80 modernization kits for its existing warplanes. Technical talks bet…