Brian Steinberg Senior TV EditorThe nation’s local news veterans are launching a bid to take on a few successful upstarts making a market in national sports.An alliance of local-media companies, the Local Media Consortium, will launch “The Matchup,“ a new online sports news effort that aims to give fans of specific teams more news about them from a wider range of outlets than just those covering it locally The group’s first effort will make more headlines about a team available to a reader, so