(Reuters) - Amazon.com Inc abruptly scrapped plans for a new headquarters in New York that could have created 25,000 jobs, blaming opposition from local leaders upset by the nearly $3 billion (2 billion pounds) in incentives promised by state and city politicians.The company said on Thursday it did not see consistently "positive, collaborative" relationships with state and local officials. Opponents of the project feared congestion and higher rents in Long Island City, Queens, and objected to..