fix: handle non-split systems in initial value promotion#3690

AayushSabharwal merged 1 commit intoSciML:backport-v9SciML/ModelingToolkit.jl:backport-v9from

AayushSabharwal:as/promote-nosplitAayushSabharwal/ModelingToolkit.jl:as/promote-nosplitCopy head branch name to clipboard