text.rs - Use LayoutContext in the last places that used DrawingCtx
text.rs - Use LayoutContext in the last places that used DrawingCtx

Part-of: <https://gitlab.gnome.org/GNOME/librsvg/-/merge_requests/626>

GNOME/librsvg,GNOME/librsvg,GNOME/librsvg,GNOME/librsvg