PARIS — Jelena Ostapenko became the first unseeded women’s finalist at the French Open in more than 30 years by beating Timea Bacsinszky on Thursday. The 47th-ranked Ostapenko, the first Latvian player to reach a Grand Slam final, won 7-6 (4), 3-6, 6-3. The last unseeded player to reach the final at Roland Garros was