LONDON (Reuters) – Roman Abramovich has completed the sale of Chelsea and related companies to an investment group led by Todd Boehly and Clearlake Capital, the Premier League club said on Monday, ending a three-month process to sell the club. The consortium, which won the bid to acquire the London side earlier this month, received approval from the Premier League and the British government last week for the sale to go ahead. A final agreement was reached on Saturday. Russian owner Abramovich put the club up for sale in early March following Russia’s invasion of Ukraine, which Moscow calls a “…