By Tom Hals WILMINGTON, Del (Reuters) -Twitter Inc will question Elon Musk under oath in Delaware next week as part of the litigation in the billionaire’s bid to walk away from his $44 billion deal for the social media company. A Tuesday filing in Delaware’s Court of Chancery said Musk’s deposition is scheduled for Sept. 26-27 and may stretch into Sept. 28 if necessary. The two sides are locked in an increasingly acrimonious legal battle that has swept up of some of the biggest names in Silicon Valley and Wall Street. Subpoenas have being issued to billionaire Larry Ellison, the co-founder of …