Partial revert of PR #1188: Copy cache for SplitFunction in promote_f#1203

ChrisRackauckas merged 1 commit intoSciML:masterSciML/DiffEqBase.jl:masterfrom

ChrisRackauckas-Claude:fix-split-cache-copyChrisRackauckas-Claude/DiffEqBase.jl:fix-split-cache-copyCopy head branch name to clipboard