(Adds quotes) By Eric Salliot Rome, May 18 (Reuters) – Serena Williams crushed Romanian qualifier Simona Halep 6-3 6-0 to book her place in the Italian Open final and extend her winning streak to 23 matches on Saturday. World number one Williams, who is chasing a fourth consecutive tour title, will face Victoria Azarenka in Sunday’s final after the third seed beat last year’s French Open finalist Sara Errani 6-0 7-5. Williams’s unbeaten run has included title successes in Miami, Charleston and Madrid and she is chasing a first Rome title since 2002, the year she won her only French Open. …