By Rami Amichai TEL AVIV (Reuters) - Once part of a faceless crowd of foreign workers who clean homes and tend to Israel's sick and elderly, a Filipina caregiver has shot to stardom on a popular TV singing contest. Rose Fostanes, 47, surprised viewers of Israel's X-Factor talent show and swept its judges off their feet with soulful renditions of pop songs by the likes of Lady Gaga and Christina ...