IOWA CITY — Facing mounting COVID-19 losses, the University of Iowa on Friday announced sweeping budget cuts that — among other things — temporarily lay off 112 housing and dining workers, freeze pay for about 4,200 other employees, leave 32 positions unfilled and cut President Bruce Harreld’s salary in half for the rest of the year.Those savings and others are meant to offset tens of millions in losses from COVID-19-related hits, extra expenses associated with bringing students back to campus this fall, cuts in state funding and projected enrollment dips that curtail tuition revenue.