SPRINGFIELD — Lawyers for plaintiffs and the state told a panel of federal judges Wednesday the issues involved in two lawsuits challenging the state’s legislative redistricting plan are “straightforward” and ought to be resolved in short order.But the three-judge panel hearing the case appeared uncertain about how much time they actually have, given the deadlines that are spelled out in the Illinois Constitution and the fact that lawmakers this year pushed back the 2022 primary by three months, to June instead of March …