SEATTLE — In a shake-up intended to boost the Pac-12 Conference’s standing in college football at large, the conference on Wednesday announced that the two teams with the highest conference winning percentage will match up in the Pac-12 football championship game. The change will take effect for the 2022 season this fall. Under the old format, the winners of the North and South divisions would meet in the conference’s championship game at the end of the regular season. The new format puts the future of the North and South divisional format very much in doubt. In a news release, the conference …