fix: respect dataset clipping area when filling line charts (#12057)

* fix(plugin.filler): respect dataset clipping area when filling line charts

The filling area must respect the dataset's clipping area when clipping is enabled. Before this change, the line would be clipped according to the dataset's area but the fill would overlap other datasets.

Closes #12052

* chore(plugin.filler): use @ts-expect-error instead of @ts-ignore