(#609): Apply the clip node's transform in DrawingCtx.clip_to_node()
(#609): Apply the clip node's transform in DrawingCtx.clip_to_node()

Fixes https://gitlab.gnome.org/GNOME/librsvg/-/issues/609

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