Fix Radau methods to support KLU with sparse jacobian prototypes#2893

ChrisRackauckas-Claude wants to merge 1 commit intoSciML:masterSciML/OrdinaryDiffEq.jl:masterfrom

ChrisRackauckas-Claude:fix/radau-klu-jacobian-prototypeChrisRackauckas-Claude/OrdinaryDiffEq.jl:fix/radau-klu-jacobian-prototypeCopy head branch name to clipboard