Several unions and lobbying groups plan to use the iPhone 5 launch to publicize a union contract dispute with Verizon Wireless. The Communications Workers of America, International Brotherhood of Electrical Workers and the AFL-CIO are being joined by MoveOn.org, US Action, and Jobs with Justice to formally announce the campaign on Monday. Dubbed “iWon’t,” the campaign will ask Americans to delay upgrading to the iPhone 5 on Verizon…