SPRINGFIELD — In the ongoing legal fight over state pension reform, state officials have so far fought unsuccessfully to justify its changes to employee benefits. But they’re not alone in arguing that a trial judge was wrong to strike down the reforms as a violation of the state constitution. At least 10 other parties — from cities and lobby groups to nonprofits and academics — have authored friend-of-the-court briefs supporting pension changes and arguing that Sangamon County Circuit Judge …