Trading in shares of Twitter was halted after the stock spiked on reports that Elon Musk would proceed with his $44 billion deal to buy the company after months of legal battles. For a second time, Musk offered to buy theSan Francisco company at $54.20. Shares jumped nearly 13% to $47.95 before trading stopped. Bloomberg News reported Tuesday that Musk made the proposal in a letter to Twitter, according to people familiar with the case who were not identified. Musk has been trying to back out of the deal for several months after signing on to buy the social media platform in April. Shareholder…