Tubi is about to get a major boost as the streaming home of Super Bowl LIX — and a hotly-anticipated half-time show by Kendrick Lamar (with SZA, no less). Fox’s ad-supported streaming service has gained popularity in recent years as a subscription-free alternative to the ever more-expensive streaming giants, and this month, it’s not just your streaming destination for the big game, it’s got also got a library full of great movies you can stream…