Web: [Charts] Add support stacked series data for the `BarChart` component

Created by: vovakulikov

Follow up for https://github.com/sourcegraph/sourcegraph/issues/32942

Background

This issue is about adding stacked like representation of the data series for the BarChart component. Similar that we had for the LineChart in this issue https://github.com/sourcegraph/sourcegraph/issues/32938 but only for BarChart.

For the reference