Attribute cycling regression in 0.24

Noticed when trying to update to new Makie 0.24 – attribute cycling stopped working with plotspecs in this version. MWE: ```julia using CairoMakie struct MyS end function Makie.convert_arguments(ct::Type{<:AbstractPlot}, ::MyS) [ Makie.to_plotspec(ct, ([Point(0, 0)],), markersize=50), Makie.to_plotspec(ct, ([Point(1, 1)],), markersize=50), ] end fig = scatter(MyS()) ``` 0.22: <img width="500" alt="Image" src="https://github.com/user-attachments/assets/810a71fa-3421-44d9-a829-b23f4b2f41d9" /> 0.24: <img width="500" alt="Image" src="https://github.com/user-attachments/assets/fc74027a-d7db-46a9-a7ec-d63e1f6107e3" /> - [ ] What version of Makie are you running? (`]st -m Makie`) 0.24 - [ ] What is the last Makie version this feature worked on? 0.22 - [ ] can you reproduce the bug with a fresh environment ? (`]activate --temp; add Makie`) yes - [ ] Which backend are you using? (GLMakie, CairoMakie, WGLMakie, RPRMakie) any - [ ] What platform + GPU are you on? any - [x] Please provide an minimal example of the failing code. If the problem is with the visualization, please provide a picture or video of it.